Phosphor bronze hydrogen embrittlement?
I have a diaphragm type spring 5.5 inch dia. x .020 thick of phosphor bronze (ASTM B139) which is required to be electroless nickel plated. My question is will hydrogen embrittlement be a problem with this process as with non electroless plating? We are presently waterjet machining the part and then hand polishing to 20 micro inch before plating.Howard Waller
- Muskogee, OK
I have never seen a reference to a problem with hydrogen embrittlement on any bronze.
1st, it is probably too soft to be a problem.
2nd, It is normally associated with grain boundaries and carbides, but not always.
I will be looking forward to the answer from somebody that knows , for sure.James Watts
- Navarre, Florida
I plated a 0.5 mm dia. phosphor bronze wire for my customer. After two weeks he came back complaining that the wire is extremely brittle.
I did a fresh job for him with anodic cleaning and Asymmetric A.C. plating and that worked.
I have not come across any reference that says explicitly that phosphor bronze is prone to hydrogen embrittlement. VijayYashawant Deval
electroplating shop Pune, maharashtra, India
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