Fiche de révision : Metal and Steel Fundamentals

📋 Course Outline

1. Metal and Steel Properties
2. Historical Use of Metals
3. Metal Modification Methods
4. Ferrous Metals
5. Nonferrous Metals
6. Steel Fabrication Techniques
7. Steel Protection and Coatings
8. Steel Structural Shapes
9. Steel Joining Methods
10. Steel Fire and Weather Resistance

📖 1. Metal and Steel Properties

🔑 Key Concepts & Definitions

• Metallic appearance of metals: Metals are characterized by their shiny, reflective surface, which is due to their ability to reflect light because of free electrons in their structure, giving them a distinctive "metallic" look (source content).

• Good conductors of heat and electricity: Metals possess high electrical and thermal conductivity because their free electrons allow easy transfer of energy, making them efficient conductors (source content).

• Pure metals are soft and malleable: In their natural, chemically pure form, metals tend to be soft and easily shaped without breaking, due to their crystalline structure and lack of impurities (source content).

• Impurities improve metal strength: The addition of impurities or alloying elements enhances the strength and durability of metals by hindering dislocation movement within the crystal lattice, thus improving their structural properties (source content).

• Precious metals scarcity and softness: Metals like platinum, gold, and silver are considered precious because of their rarity on Earth and their inherent softness, which makes them less suitable for structural applications without alloying (source content).

📝 Essential Points

• Metals naturally occur as oxide ores, which are mined and refined to extract pure metals, but these pure forms are often too soft for practical use, necessitating alloying or impurity addition to enhance strength (source content).

• The metallic appearance is a key visual characteristic used to identify metals and is linked to their high reflectivity caused by free electrons (source content).

• Conductivity of metals underpins their extensive use in electrical wiring, electronic components, and heat transfer applications, emphasizing their importance in construction and industry (source content).

• Pure metals like gold, platinum, and silver are scarce and soft, which is why they are classified as precious metals; their scarcity and softness limit their structural use but make them valuable for jewelry and decorative purposes (source content).

• Impurities or alloying elements are deliberately added to improve mechanical properties such as strength, hardness, and resistance to wear, which pure metals alone cannot provide (source content).

💡 Key Takeaway

Metals are distinguished by their metallic appearance and excellent conductive properties, but their natural softness necessitates alloying and impurity addition to achieve the strength and durability required for construction and industrial applications.

📖 2. Historical Use of Metals

🔑 Key Concepts & Definitions

• Bronze Cramps (Greek and Roman architecture): Small metal fasteners made of bronze used to join stone blocks, providing stability and durability in construction (source content).
• Wrought Iron Chains (Renaissance vaults): Flexible metal chains of wrought iron employed to counteract the thrust of masonry vaults, enhancing structural stability (source content).
• Iron Bridge (Late 18th century): The first all-metal structure built of cast iron, constructed in England, exemplifying the early use of metal in large-scale construction (source content).
• Limitations of Cast Iron and Wrought Iron (19th century): Cast iron's brittleness and wrought iron's high cost limited their structural applications, despite their increasing use in industrial buildings (source content).
• Bessemer Process (Mid-19th century): An innovative steel production method where air is blown into molten iron to remove impurities, enabling large-scale, economical steel manufacturing (source content).
• Open-Hearth Steelmaking (1868): A European-developed process that allowed for the production of high-quality steel in large quantities, further advancing steel's role in construction (source content).

📝 Essential Points

• Bronze cramps were crucial in ancient Greek and Roman architecture for joining stone blocks, demonstrating early metal use in construction.
• During the Renaissance, wrought iron chains and rods were used to counteract masonry thrusts, illustrating the evolution of metal support systems.
• The Iron Bridge, built in the late 18th century, marked the advent of all-metal structures, showcasing cast iron's potential despite its brittleness.
• In the 19th century, limitations of cast iron (brittleness) and wrought iron (cost) prompted the search for better materials, leading to innovations in steel production.
• The Bessemer process revolutionized steel manufacturing by drastically reducing production time and cost, making steel more accessible for structural purposes.
• The development of the open-hearth process in 1868 allowed for the production of high-quality steel, facilitating the construction of iconic steel frameworks like skyscrapers and bridges.

💡 Key Takeaway

The evolution of metal use in construction—from bronze cramps to steel—reflects technological advancements that expanded structural possibilities, culminating in the widespread adoption of steel as a primary building material.

📖 3. Metal Modification Methods

🔑 Key Concepts & Definitions

• Alloying metals to improve strength and workability: The process of mixing a primary metal with other elements, usually metals, to produce an alloy that exhibits enhanced mechanical properties, such as increased strength, hardness, or workability. Generally, alloys are stronger than their primary metals (source: Allen & Iano, 2019).

• Heat treatment: tempering and annealing: Techniques used to alter the properties of metals through controlled heating and cooling. Tempering involves heating steel to a moderate temperature followed by slow cooling to produce a harder and stronger metal. Annealing heats metals like steel and aluminum to high temperatures and cools them slowly to soften the material for easier work (source: Lyons, 2010).

• Cold-working metals: cold rolling and drawing: Mechanical deformation processes performed at room temperature to increase metal strength and hardness. Cold rolling involves passing metal between rollers to thin it, while drawing pulls metal through smaller orifices to produce wires with higher tensile strength. These processes also induce brittleness, which can be reversed by annealing (source: Schexnayder & Doctor, 2021).

• Coating methods: anodizing: An electrochemical process that forms a controlled oxide layer on metals like aluminum, enhancing surface appearance and corrosion resistance. The oxide layer can be colored for aesthetic purposes (source: Varghese, 2015).

• Electroplating: A wet process where a metal object is coated with a thin layer of another metal via electrodeposition, improving corrosion resistance and appearance. Chromium and cadmium are common coatings for steel (source: Allen & Iano, 2019).

• Galvanizing: The process of coating steel with zinc to prevent rust and corrosion, typically through hot-dip galvanizing, which provides durable, long-lasting protection (source: Levy, 2010).

📝 Essential Points

• Alloying enhances the mechanical properties of metals, making them suitable for construction and industrial applications, often creating self-protecting oxide layers that resist corrosion.
• Heat treatments like tempering and annealing are crucial for modifying the hardness, strength, and ductility of metals, depending on their intended use.
• Cold-working processes such as cold rolling and drawing significantly increase the strength and hardness of metals at room temperature but can make them more brittle; annealing can reverse these effects.
• Coating methods serve to protect metals from environmental damage and improve aesthetics. Anodizing creates a durable oxide layer on aluminum, while electroplating deposits a protective or decorative metal layer.
• Galvanizing with zinc is a cost-effective method to protect steel from corrosion, especially in outdoor or humid environments.

💡 Key Takeaway

Metal modification methods like alloying, heat treatment, cold-working, and coating are essential techniques to enhance the strength, durability, and aesthetic appeal of metals used in construction, ensuring they meet specific performance requirements.

📖 4. Ferrous Metals

🔑 Key Concepts & Definitions

• Ferrous metals: Metals in which the chief ingredient is iron (Fe), found in large quantities in the earth’s crust, and characterized by their metallic appearance and magnetic properties. Allen & Iano (2019) describe ferrous metals as those containing iron, widely used in construction for their strength and durability.

• Cast iron: An alloy of iron with carbon content above 1.7%, known for high compressive strength, high vibration absorption, but brittle; used in gratings and stair components. Allen & Iano (2019) note its production from iron ore in a blast furnace and its limited use in structural applications due to brittleness.

• Wrought iron: Iron with almost no carbon, produced by repeatedly beating it with a hammer to remove slag, making it soft, tough, and ductile; ideal for ornamental work and below-grade applications. Allen & Iano (2019) highlight its high corrosion resistance and ease of shaping.

• Mild steel: Ordinary structural steel with low carbon content, used in framing, studs, and fasteners; it balances strength and ductility. Levy (2010) states that mild steel's low carbon level makes it suitable for general structural purposes.

• Stainless steel: An alloy of iron with chromium (and often nickel), designed for corrosion resistance; used in hardware, finishes, and environments requiring durability. Allen & Iano (2019) emphasize its alloying elements that enhance corrosion resistance and aesthetic appeal.

• Steel (general): Iron with controlled low carbon content, used extensively in structural components, fasteners, and decorative work. Allen & Iano (2019) describe steel as an alloy with various elements like chromium, nickel, and molybdenum that modify its properties for specific applications.

📝 Essential Points

• Ferrous metals are categorized mainly into cast iron, wrought iron, mild steel, and stainless steel, each with distinct properties and uses. Cast iron's brittleness limits its structural use, while wrought iron's ductility makes it ideal for ornamental purposes.

• The development of steel, especially after the introduction of the Bessemer process in the mid-19th century, revolutionized construction by providing a strong, economical, and versatile material. The Bessemer process allowed large batches of steel to be produced quickly, vastly improving structural capabilities (Allen & Iano, 2019).

• Alloying elements such as chromium and nickel are added to steel to enhance corrosion resistance and mechanical properties. For example, stainless steel's chromium content forms a protective oxide layer, preventing rust (Allen & Iano, 2019).

• Steel's properties can be modified through various fabrication techniques like casting, forging, rolling, and welding, enabling its use in a wide range of structural and decorative applications.

• Steel grades are classified using standards such as ASTM and PNS, which specify properties like yield strength, tensile strength, and elongation, ensuring suitability for specific construction needs (Allen & Iano, 2019).

💡 Key Takeaway

Ferrous metals, especially steel and cast iron, are fundamental in construction due to their strength, versatility, and ability to be modified through alloying and fabrication processes. The development of steel production techniques like the Bessemer process significantly advanced building capabilities and material efficiency.

📖 5. Nonferrous Metals

🔑 Key Concepts & Definitions

• Definition of nonferrous metals: Metals containing little or no iron, distinguished by their resistance to corrosion and ease of fabrication, often used in construction and electrical applications (see source content).

• Aluminum properties and applications: A lightweight, corrosion-resistant metal that can be alloyed to enhance strength; used in curtain walls, roofing, wiring, and hardware due to its high reflectivity and electrical conductivity (see source content).

• Brass composition and uses: An alloy of copper and zinc, capable of being polished to a high luster; primarily used for weather stripping, ornamental work, and hardware (see source content).

• Bronze composition and corrosion resistance: An alloy of copper and tin that resists corrosion; commonly used in hardware, weather stripping, and decorative applications (see source content).

• Copper properties and patina formation: Ductile, corrosion-resistant, with high thermal and electrical conductivity; develops a green patina over time when exposed to the atmosphere, which provides natural corrosion protection (see source content).

• Lead properties and applications: A dense, soft, and easily worked metal that is highly corrosion-resistant; used in waterproofing, sound and vibration blocking, and radiation shielding, though its use is declining due to toxicity (see source content).

📝 Essential Points

Nonferrous metals are characterized by their minimal iron content, offering advantages such as ease of fabrication, high electrical and thermal conductivity, and superior corrosion resistance compared to ferrous metals. Aluminum, as a prime example, can be alloyed to improve its strength, making it suitable for a wide range of construction applications like roofing, curtain walls, and wiring (see source content). Brass and bronze are notable for their aesthetic qualities and corrosion resistance, often used in hardware and decorative elements. Copper naturally forms a patina that acts as a protective layer, which takes years to develop fully but enhances longevity. Lead, despite its toxicity, remains valuable in specific applications like waterproofing and radiation shielding due to its density and corrosion resistance. These metals are typically fabricated through casting, drawing, extrusion, forging, and various joining methods such as welding, brazing, and mechanical fastening (see source content). Their selection depends on properties like strength, corrosion resistance, and aesthetic requirements, with specific standards such as ASTM and PNS guiding their classification and use.

💡 Key Takeaway

Nonferrous metals offer essential advantages in construction due to their corrosion resistance, ease of fabrication, and diverse applications, making them vital materials alongside ferrous metals in building and industrial projects.

📖 6. Steel Fabrication Techniques

🔑 Key Concepts & Definitions

Casting: The process where molten metal is poured into a shaped mold to create a specific form. Although the resulting metal is relatively weak, it allows for complex shapes such as faucets or hardware (source content).

Forging: A manufacturing process involving heating metal until it becomes malleable and then shaping it by hammering or pressing. This technique imparts a grain orientation that enhances the metal’s structural performance (source content).

Welding: A high-temperature fusion process where two metals are melted together using a gas flame or electric arc, creating a joint as strong as the base metals. It is commonly used for structural steel connections (source content).

Cold Rolling and Drawing: Cold rolling involves passing metal between rollers at room temperature to increase strength and surface finish. Drawing pulls metal through smaller orifices to produce wires with high tensile strength, often used in prestressing concrete (source content).

Use of Steel Alloys in Fabrication: Steel alloys are created by adding elements like chromium, nickel, or molybdenum to improve properties such as corrosion resistance, hardness, and tensile strength. For example, stainless steel contains chromium and nickel for enhanced durability (source content).

Heat Treatment Effects on Fabrication: Processes like tempering and annealing modify steel’s properties. Tempering heats steel to moderate temperatures and cools it slowly to produce a harder, stronger metal, while annealing involves high-temperature heating followed by slow cooling to soften the metal for easier workability (source content).

📝 Essential Points

• Steel fabrication techniques such as casting, forging, welding, and machining are fundamental in shaping and strengthening steel components for construction.
• Casting allows for complex shapes but produces weaker metals; forging enhances strength through grain orientation.
• Welding provides strong, permanent joints suitable for structural applications, while cold rolling and drawing significantly increase the tensile strength of steel wires.
• The use of steel alloys enables tailoring properties like corrosion resistance and hardness, critical for specific construction needs.
• Heat treatments like tempering and annealing are essential for adjusting steel’s mechanical properties, balancing strength and ductility.
• Wrought iron, historically used in ornamental fabrication, is valued for its high corrosion resistance and malleability.

💡 Key Takeaway

Steel fabrication techniques such as casting, forging, welding, and cold working, combined with the strategic use of steel alloys and heat treatments, are vital for producing durable, high-performance steel components in construction.

📖 7. Steel Protection and Coatings

🔑 Key Concepts & Definitions

• Galvanizing steel with zinc for corrosion protection: A process where zinc is applied to steel, typically via hot-dip galvanizing, creating a protective barrier that prevents rust and corrosion by sacrificially corroding before the steel does (Luigi Galvani, late 18th century). Zinc coatings provide a durable, long-lasting defense against environmental elements.

• Electroplating with chromium and cadmium: A wet finishing process where a thin layer of chromium or cadmium is electrodeposited onto steel or other metals, enhancing corrosion resistance and aesthetic appeal (Waldman, 2022). Chromium plating offers a shiny, protective surface, while cadmium provides corrosion resistance in specific environments.

• Powder coating as dry finishing process: A method where dry powder, usually a polymer, is electrostatically applied to metal surfaces and then cured under heat to form a protective, decorative film. It offers high durability and uniform coverage (Waldman, 2022).

• Porcelain or vitreous enamel finish: A hard, glass-like coating fused onto steel or other metals through firing, creating a resistant, decorative surface available in various colors. It provides excellent chemical and thermal resistance (Waldman, 2022).

• Paint, lacquer, and enamel finishes on aluminum: Protective and decorative coatings applied to aluminum surfaces after chemical pretreatment. These finishes enhance corrosion resistance and aesthetic qualities, with proper surface preparation being essential to prevent galvanic action (Allen & Iano, 2019).

📝 Essential Points

• Steel, unlike aluminum, does not naturally form a protective oxide coating; thus, it requires additional protective coatings such as galvanizing, electroplating, or paint to prevent corrosion.

• Galvanizing (hot-dip) is the most common and reliable method for protecting steel in harsh environments, creating a sacrificial zinc layer that corrodes preferentially, safeguarding the steel underneath.

• Electroplating with chromium and cadmium is primarily used for decorative purposes and to improve corrosion resistance, especially in smaller components or exposed surfaces.

• Powder coating provides a durable, uniform, and environmentally friendly finish, suitable for both interior and exterior steel applications.

• Porcelain or vitreous enamel finishes are used where chemical resistance and aesthetic qualities are prioritized, often in sanitaryware and decorative panels.

• Complete coatings are crucial to prevent galvanic action; uncoated or improperly coated areas can lead to galvanic corrosion, especially when dissimilar metals are in contact.

• Proper surface preparation and application techniques are essential to maximize the effectiveness of protective coatings and ensure long-term durability.

💡 Key Takeaway

Effective steel protection relies on applying complete, suitable coatings—such as galvanizing, electroplating, or specialized finishes—to prevent corrosion and galvanic action, thereby extending the lifespan and maintaining structural integrity.

📖 8. Steel Structural Shapes

🔑 Key Concepts & Definitions

• Common steel structural shapes: Standardized forms of steel used in construction, including I-beams, channels, angles, and plates, designed for specific load-bearing and structural functions (Allen & Iano, 2019).

• Use of steel in framing and structural components: Steel is extensively employed in framing systems, providing strength, ductility, and flexibility for load transfer, especially in high-rise and large-span structures (Levy, 2010).

• Steel studs, joists, and fasteners: Steel studs are vertical framing members used in wall construction; steel joists are horizontal supports for floors and roofs; fasteners such as bolts and screws join steel components, ensuring structural integrity (Lyons, 2010).

📝 Essential Points

• Steel shapes are manufactured in standardized profiles like I-beams, channels, angles, and plates, which are selected based on their structural requirements and load conditions.

• The use of steel in framing allows for rapid construction, high strength-to-weight ratio, and adaptability to various architectural designs, making it a preferred material in modern building construction.

• Steel studs, joists, and fasteners are integral to framing systems, providing efficient load transfer and ease of assembly. These components are often galvanized or coated to prevent corrosion, especially in exposed or humid environments.

• Structural steel shapes are classified and graded according to standards such as ASTM and PNS, which specify dimensions, mechanical properties, and quality requirements.

• The versatility of steel shapes supports complex structural configurations, including long spans and high-rise frameworks, contributing to innovative architectural solutions.

💡 Key Takeaway

Steel structural shapes are essential building blocks that enable efficient, strong, and flexible framing systems, with standardized profiles and components like studs, joists, and fasteners playing a crucial role in modern construction.

📖 9. Steel Joining Methods

🔑 Key Concepts & Definitions

• Welding (Allen & Iano, 2019): A high-temperature fusion process where two metals are melted together, often using a gas flame or electric arc, resulting in a joint as strong as the base metals. Welding is widely used for structural steel connections due to its strength and permanence.

• Brazing and Soldering (Allen & Iano, 2019): Lower-temperature joining methods where two metals are not melted but joined with a filler metal having a lower melting point, such as brass or lead-tin alloy. These methods are used mainly for plumbing and roofing, not structural purposes.

• Mechanical Methods (Schexnayder & Doctor, 2021): Techniques involving physical fastening, such as drilling or punching holes for screws, bolts, or rivets, to join steel components. These are common for non-welded structural connections and assemblies.

• Interlocking and Folding (Lyons, 2010): Methods where sheet metal is joined by folding edges or interlocking parts, often used in forming steel profiles and panels, providing secure connections without additional fasteners.

• Use of Hidden Bronze Cramps (Levy, 2010): Historically, small bronze cramps were embedded within stone blocks to join them invisibly, ensuring structural stability while maintaining aesthetic integrity in ancient architecture.

• Use of Wrought Iron Chains and Rods (Mehta et al., 2013): Structural support elements in historic construction, where wrought iron chains and rods were employed to resist tension and stabilize masonry or stone structures, especially in Renaissance and early modern buildings.

📝 Essential Points

• Steel joining methods primarily include welding, brazing, soldering, and mechanical fastening, each suited to different structural and non-structural applications (Allen & Iano, 2019; Schexnayder & Doctor**, 2021).

• Welding creates permanent, high-strength joints suitable for structural steel, but requires skilled labor and proper safety measures.

• Brazing and soldering are used for plumbing and decorative applications where lower strength joints suffice; they operate at lower temperatures and are less suitable for load-bearing connections.

• Mechanical methods such as bolting and riveting are versatile and allow for disassembly or adjustments, often used in prefabricated steel structures.

• Historically, bronze cramps (see section 3) were used to join stone blocks invisibly, demonstrating early techniques of concealed connections.

• Wrought iron chains and rods (see section 3) provided tension support in historic masonry and steel structures, illustrating the use of tension elements before modern steel fabrication.

• The choice of joining method depends on factors like load requirements, environmental conditions, ease of assembly, and historical context.

💡 Key Takeaway

Steel joining methods encompass a range of techniques from welding to mechanical fastening, each tailored to specific structural needs, with historical practices like bronze cramps and wrought iron tension elements illustrating early solutions for durable, concealed, or tension support connections.

📖 10. Steel Fire and Weather Resistance

🔑 Key Concepts & Definitions

Steel fire resistance (implied): The ability of steel to withstand high temperatures during a fire without losing structural integrity, often enhanced through protective coatings or encasements to prevent weakening and failure.

Weather resistance of metals via coatings and alloys: The capacity of metals to withstand environmental elements such as moisture, temperature fluctuations, and pollutants, achieved through protective surface treatments like galvanizing, anodizing, or alloying with corrosion-resistant elements (see "Steel Protection and Coatings").

Corrosion resistance of stainless steel and nonferrous metals: The inherent or enhanced ability of these metals to resist oxidation and deterioration caused by environmental exposure, primarily due to the formation of stable oxide layers (e.g., chromium oxide in stainless steel).

Patina formation on copper: A natural oxidation process where copper develops a greenish coating called patina over years of exposure, which acts as a protective barrier against further corrosion (see "Copper" in nonferrous metals).

📝 Essential Points

• Steel’s fire resistance is critical in construction; although steel does not melt at typical building fire temperatures, it weakens significantly when heated, risking structural failure. Fireproofing methods include encasing steel in gypsum boards, mineral-fiber sprays, or masonry, which absorb and dissipate heat (source: "Steel Fire and Weather Resistance" content).

• Weather resistance of metals is enhanced through coatings such as galvanizing (zinc coating), anodizing (aluminum oxide layer), and specialized alloys. These treatments prevent moisture ingress and reduce corrosion, extending the lifespan of steel and nonferrous metals in outdoor or harsh environments.

• Stainless steel’s corrosion resistance stems from its alloying elements, mainly chromium, which forms a passive oxide film that protects against oxidation and environmental attack. Its use is widespread in architectural applications requiring durability.

• Nonferrous metals like copper naturally develop patina over time, which provides a self-protective layer preventing further corrosion. This process is slow but effective, making copper suitable for long-term outdoor applications like roofing and cladding.

• Galvanic corrosion occurs when dissimilar metals are in contact in a conductive environment, leading to accelerated deterioration of the less noble metal (see "Steel Protection and Coatings" and "Galvanic Series").

💡 Key Takeaway

Steel’s fire and weather resistance depend heavily on protective coatings and alloying strategies, while natural patina formation on copper offers a sustainable, self-protecting mechanism against corrosion. Proper treatment and understanding of these properties are essential for durable, safe building design.

📊 Synthesis Tables

⚠️ Common Pitfalls & Confusions

1. Confusing metallic appearance with actual metal composition; appearance alone doesn't confirm metal type.
2. Overlooking the importance of impurities and alloying in strengthening metals; pure metals are often too soft.
3. Misunderstanding heat treatments: annealing softens, tempering hardens; mixing their effects.
4. Assuming all metals are equally conductive; nonferrous metals like aluminum have different conductivity levels.
5. Mistaking bronze cramps for modern fasteners; they are historically used in ancient architecture.
6. Believing cast iron is suitable for structural load-bearing; its brittleness limits its use.
7. Confusing galvanizing with electroplating; galvanizing involves zinc coating, electroplating deposits various metals.
8. Overgeneralizing steel protection methods; specific coatings suit different environments and steel types.
9. Misidentifying steel fabrication techniques; processes like cold working and heat treatment serve different purposes.
10. Underestimating the evolution of metal use, from bronze to steel, driven by technological advances.

✅ Exam Checklist

• Know the defining features of metals: metallic appearance, conductivity, malleability, and how impurities/alloying improve properties.
• Understand the historical progression of metal use: bronze cramps, wrought iron chains, Iron Bridge, and the impact of the Bessemer and open-hearth processes.
• Be able to explain alloying, heat treatments (tempering, annealing), and cold-working processes (rolling, drawing) and their effects.
• Recognize key authors and references: Allen & Iano (metal modification methods), Lyons (heat treatment), Lyons & Lyons (metal properties), Schexnayder & Doctor (cold working), Varghese (anodizing), Levy (galvanizing).
• Describe the purpose and process of anodizing, electroplating, and galvanizing for metal protection.
• Identify the main ferrous and nonferrous metals, their characteristics, and typical applications.
• Know steel fabrication techniques, including shaping and forming methods.
• Understand steel protection methods: coatings, paints, and galvanizing.
• Recognize common steel structural shapes and their uses.
• Be familiar with steel joining methods: welding, bolting, riveting.
• Know steel's fire and weather resistance properties and protective measures.
• Master the evolution and significance of steel in construction history.
• Be able to compare properties and uses of ferrous vs. nonferrous metals.
• Understand the environmental and durability considerations in steel protection and coatings.
• Recall key authors and references for each concept or process.