28 September 2018

Anti-Seize and corrosion protection

Does Anti Seize cause Corrosion?

1. Does Anti Seize cause Corrosion?

It is often said in industry that copper-based anti-seize compounds can cause galvanic (bimetallic) corrosion in some systems, particularly involving stainless steel or galvanised fasteners. In the overwhelming majority of stainless steel or galvanised systems, this does not occur.

In the few systems where this does occur, it is often caused by a low-quality anti seize compound that dries out, evaporates or washes out – This can leave bare copper and bare steel/zinc in the presence of water.

ROCOL Anti-Seize Compound provides excellent corrosion prevention, even when placed between dissimilar metals because it has high resistance to drying out, washing out and evaporation:

If bimetallic corrosion is a risk or likely to occur in a particular system, ROCOL suggest the use of Anti Seize Stainless, which is free from metal powders, or Anti-Seize 797 (Nuclear Grade) which is a nickel-containing alternative to copper.

ROCOL are able to provide guidance on the correct anti-seize compound to use

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