Bare corrosion protection of metals
PASSIVATON /TOC
Ecosil offers eco-friendly passivation treatments and thin films that protect galvanized steel coils from atmospheric corrosion.
Fresh zinc-coated steel coils are susceptible to oxidation, known as "wet storage stain," when exposed to humidity during shipping or storage. Traditionally, a toxic Cr6-based passivation solution was used to create an anticorrosive thin film (conversion coating) on zinc surface, but safer, environmentally friendly alternatives are now widely adopted in the industry. The most effective of these technologies include:
Silane-based, Cr-free passivation treatment (white paper)
Trivalent Chromium (Cr3) passivation treatment (white paper)
Cr-free Thin Organic Coatings (TOCs) (white paper)
Through our joint venture, Shanghai Xingyu-Ecosil, these products have seen widespread use in major Asian steel mills. Notable clients include Baosteel, Ansteel, Panzihua Steel, Sougang Steel, JISCO, and others.