Chrome surface of the housing

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Chrome surface of the housing

Post by RobinPZ72 » Fri Nov 09, 2018 5:42 pm

Does anyone know what the chrome surface is on the housing?

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Re: Chrome surface of the housing

Post by Dave2112 » Fri Nov 09, 2018 6:00 pm

Nitride I believe :thumright:
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Re: Chrome surface of the housing

Post by PeteH » Fri Nov 09, 2018 6:11 pm

That's a lovely oxymoron! ;)

The chrome on the housing is almost certainly normal hard chroming (same as you get on things like motorcycle fork stanchions). The side plates are nitrided, which is applying heat in a nitrogen rich atmosphere to harden the surface.
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Re: Chrome surface of the housing

Post by ChrisHolmes » Fri Nov 09, 2018 7:15 pm

Somewhere at sometime I read that it's a special chroming process that has an oil retentive finish, then maybe I dreamt that I read it!
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Re: Chrome surface of the housing

Post by RobinPZ72 » Fri Nov 09, 2018 7:17 pm

So it's no nikasil?

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Re: Chrome surface of the housing

Post by ChrisHolmes » Fri Nov 09, 2018 7:24 pm

Definitely not Nicasil.
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Re: Chrome surface of the housing

Post by RobinPZ72 » Fri Nov 09, 2018 7:43 pm

Awesome thanks!

I was in a discussion with an old engineering acquaint who's very handy due to them having every type of machine tool imaginable! We somehow got into speaking mineral and synthetic oils and how synthetics react to chrome surface types!

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Re: Chrome surface of the housing

Post by 13Black » Fri Nov 09, 2018 11:46 pm

According to one of the papers I have:

Micro Channel Porous (MCP) Cr-plating.
Pinpoint pores for better oil retention.
Fluorocarbon resin coating.

Not entirely sure if that's applicable to Renesis housings or other rotary housings or some other test engines atm.
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Re: Chrome surface of the housing

Post by ChrisHolmes » Sat Nov 10, 2018 8:25 am

Aside from the Flourocarbon resin coating then that's what I read somewhere
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Re: Chrome surface of the housing

Post by warpc0il » Sat Nov 10, 2018 1:11 pm

It's all there in the Technical FAQ section...
rotor_housing_construction.jpg
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Re: Chrome surface of the housing

Post by 13Black » Sat Nov 10, 2018 1:22 pm

Yay, one million points to meeeeeee
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Re: Chrome surface of the housing

Post by RobinPZ72 » Sat Nov 10, 2018 1:35 pm

Clever boy, but a million!!!

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Re: Chrome surface of the housing

Post by nightfire10 » Sat Nov 10, 2018 2:03 pm

I think that's one melion points

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Re: Chrome surface of the housing

Post by HwAoRrDk » Sat Nov 10, 2018 2:11 pm

13Black wrote:
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Re: Chrome surface of the housing

Post by ChrisHolmes » Sat Nov 10, 2018 3:29 pm

13Black wrote:
Fri Nov 09, 2018 11:46 pm
According to one of the papers I have:

Micro Channel Porous (MCP) Cr-plating.
Pinpoint pores for better oil retention.
Fluorocarbon resin coating.

Not entirely sure if that's applicable to Renesis housings or other rotary housings or some other test engines atm.
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Original engine 86000 smiles (169.7 rwhp) and then it died!
Own build Steet ported engine fitted Feb 2018 and running sweet as nut

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