Browse Publications Technical Papers 2001-01-0644
2001-03-05

High Performance Alternative to Hexavalent Chromium Passivation of Plated Zinc and Zinc Alloys 2001-01-0644

Hexavalent chrome passivates have been used for improving the corrosion resistance of sacrificial zinc and zinc alloy coatings on ferrous substrates for many years. However, forthcoming legislation and corporate policies are beginning to curtail the use of hexavalent chrome compounds and replacements are actively being sought.
Comparative corrosion resistance data is presented here. The data shows that the corrosion resistance of the trivalent passivates do not significantly diminish after thermal shock, as is the case with hexavalent chromates. This makes it particularly suitable for components that are subjected to high ambient temperatures.
No changes to the dimensional characteristics of the components occur. Recommended application areas include the engine compartment, brake components, fasteners of all sizes and fluid system components.
When used in conjunction with certain final finishes, these hexavalent chrome free passivates have the potential to replace more expensive alloy or dip spin type coatings.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Corrotect® Rust Prevention for Rolling Bearings and Precision Parts

2003-01-3611

View Details

STANDARD

Hose Clamp Specifications

J1508_200903

View Details

TECHNICAL PAPER

Surface Mineralization as an Alternative to Cadmium Plating and Hexavalent Chromate Treatment for Corrosion Protection

2005-01-3506

View Details

X