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That is the nitrate, Marc. This Wikipedia article says that
nikasil was developed specifically to address Apex seals.
The side plates (iron) have some kind of treatment
that penetrates them shallowly. At one time shops still
were able to retreat the ground ones- it was a gas of
some sort mixed with ammonia?
M
Sent from my iPad
Ernest,
You are correct. The housings are porous
chrome. Don’t think Mazda invented nikasil but
I’m sure they tested it. I know there were
several companies testing it or running it in
the Early 70’s.
Bill
I was looking into
nikasil coatings and was surprised to
read that it was originally developed
by Mazda for the rotary engines. I
thought the rotor housings were chrome
plated. Is it really nikasil instead?
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