Knowledge
Coatings & Corrosion
Understand metallic coatings, corrosion mechanisms and protection.
Articles: 4
All Knowledge
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Does Galvanized Steel Rust? White Rust, Red Rust, and Zinc Protection
Galvanized steel can develop red rust after local zinc protection is depleted. Learn to distinguish white zinc corrosion, transferred stains and substrate rust.
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Galvanized vs Galvalume
Compare zinc and 55% Al-Zn coatings for corrosion, cut edges, forming, paint and roofing, with specific exposure limits and designation context.
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What is Galvalume steel?
Understand Galvalume chemistry, production and corrosion mechanisms, its trademark, PPGL, and current ASTM A792 Type 1 and Type 2 scope.
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What is galvanizing?
Learn how zinc is applied through batch hot-dip, continuous sheet and electrolytic processes, and how the coating protects exposed steel.