15-5 ph passivation & corrosion after salt spray test
15-5 ph passivation & corrosion after salt spray test
(OP)
dear all
we perfom passivation per astm a-967 on screws
made from 15-5.
when we test them for two hours in salt spray we get rust
could you advise please
thanks
we perfom passivation per astm a-967 on screws
made from 15-5.
when we test them for two hours in salt spray we get rust
could you advise please
thanks





RE: 15-5 ph passivation & corrosion after salt spray test
RE: 15-5 ph passivation & corrosion after salt spray test
thats what I wanted to hear
the passivator told me that for 15-5 two hours are too aggresive....
RE: 15-5 ph passivation & corrosion after salt spray test
RE: 15-5 ph passivation & corrosion after salt spray test
about the process for the fasteners Im not sure (Ill find out and get back to you) about the passivation it was per ASTM 967 Nitric I
(what is t4 temp?)
RE: 15-5 ph passivation & corrosion after salt spray test
If you are pickling it the time, temperature, and concentration could wrong. The passivisation step is also open to problems especially if your pickling step is excessive. As in pickling, time, temperature, and concentration are important.
Awaiting your response.
RE: 15-5 ph passivation & corrosion after salt spray test
Yes, it should pass no problem. Either they were very bad to start with or the passivation was not correct.
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Plymouth Tube
RE: 15-5 ph passivation & corrosion after salt spray test
Cedar Bluff Engineering
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