Cobalt-free, Cr(III) Thick Film Passivate
TriPass ELV 3300 cobalt-free, trivalent chromium thick film passivate delivers exceptional corrosion protection that may eliminate the need for a post-seal or lacquer, especially when used as part of a complete Enthone zinc or zinc alloy system. The extremely versatile process may be used over acid zinc, as well as alkaline zinc and zinc alloys.The process meets automotive industry demands for a highly corrosion resistant Cr(VI)-free alternative.
An environmentally sound and OEM-preferred alternative to hexavalent chromates and conventional thick film passivates, TriPass ELV 3300 does not require the addition of cobalt salts to achieve high salt spray protection values. TriPass ELV 3300 meets the emerging European government directive to eliminate Substances of Very High Concern (SVHC), which will include the banning of cobalt salts.
TriPass ELV 3300 may be used in either rack or barrel applications. In accordance with ISO 4227 / ASTM B117 neutral salt spray testing, the passivate provides corrosion resistance of 120 hours (barrel application) and 240 hours (rack application) without white rust. For many parts, the NSS figures will be even higher, depending on substrate quality and application technology. The formation of black spots during salt spray is significantly reduced.
The TriPass ELV 3300 solution creates a clear, slightly iridescent passivate film without clouds and stains. The passivate layers are listed in the IMDS system under code 3641289 and meet ELV, RoHS and WEEE requirements. TriPass ELV 3300 offers ease of handling and a wide operating range.
Consistency, reliability and control of the zinc or zinc alloy passivation passivation can be further optimized with M-Logic process monitoring software.