OK, here's an idea HK can help with. Last time I was at the marina at
St Marks, I was impressed by a bin full of dead aluminum props.
Actually, I was told that most could be salvaged but it prob would not
be worthwhile except for the larger ones. I asked "Why not coat Al
props with Nickel" and was told that any coating will wear off due to
cavitation and due to sand hitting it. he even showed me a prop that
had run through an oyster bar, NASTY.
However, I think the guy might be wrong. Electroless Ni adheres very
strongly. It is much harder than almost any other such coating too.
The Boron nitride electroless nickel alloys are both hard and slippery
so would resist such abrasion.
Thoughts?

Frogwatch wrote:
OK, here's an idea HK can help with. Last time I was at the marina at
St Marks, I was impressed by a bin full of dead aluminum props.
Actually, I was told that most could be salvaged but it prob would not
be worthwhile except for the larger ones. I asked "Why not coat Al
props with Nickel" and was told that any coating will wear off due to
cavitation and due to sand hitting it. he even showed me a prop that
had run through an oyster bar, NASTY.
However, I think the guy might be wrong. Electroless Ni adheres very
strongly. It is much harder than almost any other such coating too.
The Boron nitride electroless nickel alloys are both hard and slippery
so would resist such abrasion.
Thoughts?


Try carbonitriding. Read up on "Tenifer QPQ" Have a nice day.

On Sep 3, 11:20*am, H the K wrote:
Frogwatch wrote:
OK, here's an idea HK can help with. *Last time I was at the marina at
St Marks, I was impressed by a bin full of dead aluminum props.
Actually, I was told that most could be salvaged but it prob would not
be worthwhile except for the larger ones. *I asked "Why not coat Al
props with Nickel" and was told that any coating will wear off due to
cavitation and due to sand hitting it. *he even showed me a prop that
had run through an oyster bar, NASTY.
However, I think the guy might be wrong. *Electroless Ni adheres very
strongly. *It is much harder than almost any other such coating too.
The Boron nitride electroless nickel alloys are both hard and slippery
so would resist such abrasion.
Thoughts?

Try carbonitriding. Read up on "Tenifer QPQ" Have a nice day.

Is carbonitriding done to Aluminum? I see it done to steel and in
fact measuring its thickness is one of our specialties.

On Thu, 3 Sep 2009 08:12:17 -0700 (PDT), Frogwatch
wrote:

OK, here's an idea HK can help with. Last time I was at the marina at
St Marks, I was impressed by a bin full of dead aluminum props.
Actually, I was told that most could be salvaged but it prob would not
be worthwhile except for the larger ones. I asked "Why not coat Al
props with Nickel" and was told that any coating will wear off due to
cavitation and due to sand hitting it. he even showed me a prop that
had run through an oyster bar, NASTY.
However, I think the guy might be wrong. Electroless Ni adheres very
strongly. It is much harder than almost any other such coating too.
The Boron nitride electroless nickel alloys are both hard and slippery
so would resist such abrasion.
Thoughts?

Already been done - HPC does it. They also do ceramic and have an
organic application for props.

http://www.hpcoatings.com/about/default.aspx

They are based in North Carolina I believe.