Nickel vs Copper based anti-seize
in General Tech Discussion
4 hours ago
The Rotax MMH (for 912 etc) specifies Loctite (copper-based) anti-seize compounds for coating the exhaust system couplings, flanges, and mounting bolts etc. But it seems nickel-based compounds are kinder to stainless steel at elevated temperatures. I am interested in any experiences and/or opinions on this. In particular the appropriate compound for coating the exhaust manifold pipe where it enters into the aluminium cylinder block.
The following link is interesting:
Copper vs Nickel Anti-Seize: An Overview - MFG Shop
and makes the following point:
Metal Compatibility
- Copper Anti-Seize: Generally compatible with most metals but may cause intercrystalline corrosion on stainless steel.
- Nickel Anti-Seize: Safe for use with stainless steel and high-alloy metals, preventing galvanic corrosion.
