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

On Aug 8, 2020, at 12:28 AM, William Jepson wrjjrs@gmail.com <flyrotary@lancaironline.net> wrote:



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

On Fri, Aug 7, 2020 at 7:46 PM Ernest Christley echristley@att.net <flyrotary@lancaironline.net> wrote:

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?