Materials Protection & Surface Engineering
Materials Protection & Surface Engineering covers how metal is kept from corroding and how surfaces are prepared and coated: temporary rust protection, rust and paint removal, pretreatment and conversion coatings, powder and e-coat finishing, and protective coatings for steel structures.
Pretreatment, conversion coatings and passivation
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Zinc plating vs hot-dip galvanizing: which coating to specify
Zinc plating suits small threaded parts in mild exposure; hot-dip galvanizing suits outdoor steel needing far more zinc. Compare thickness, threads, specs.
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How to choose an aluminum conversion coating: Cr6, Cr3 or none
Use hexavalent chromate only where a spec demands it, trivalent chromium for conductive or paint-base parts and zirconium films for painted parts.
Turn technical reasoning into better results.