Materials Technology - Surface Treatments and Coatings
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9 Terms
Surface Treatment
Modifying a part's surface to enhance properties like appearance, corrosion resistance, hardness, fatigue life, and wear resistance.
Coating
Depositing a different material onto the original material.
Surface Cleaning Methods
Mechanical (abrasive blasting, ultrasonic cleaning) and chemical (alkaline, acid, solvent, emulsion cleaning).
Surface Treatment Goal for Steels
Achieve high surface hardness with a tough core.
Nitriding
Nitrogen surface adsorption to improve mechanical properties such as high hardness and corrosion resistance.
Carburizing
Increases surface hardening by adding ~1% C to the surface of low carbon steels (0.08-0.25% C).
Galvanization
Active metallic coatings (anodic) relative to steel, providing sacrificial protection.
Electrodeposition
Electrochemical coating via metallic ion deposition on a cathode.
Thermal Spraying
Coating materials (metals, carbides, ceramics) applied melted or partially melted to provide corrosion, wear, and high-temperature oxidation resistance.
Flashcards (22)