V.S. Heat Treatment
Heat treatment & metal finishing experts
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V.S. Heat Treatment
Heat treatment & metal finishing experts
VSHeat Assistant
AI helper, 24/7
280h
salt spray
Cr3+ Black
Specification
A bolt manufacturer exporting to Europe needed RoHS-compliant zinc plating with a 240-hour salt spray rating.
Migrated process to Cr3+ Black Passivation with X-ray thickness verification on every batch.
Passed 280-hour salt-spray testing (beating the 240-hour target) with consistent coating thickness every lot. The customer now exports to Europe continuously with zero returns and noticeably lower re-inspection costs.