Electrolitic Nickel Rust
Electrolitic Nickel Rust
(OP)
What could cause rust spots on .00015-.00025 electrolitic
Nickel over 1008-1010 COLD Rolled Steel?
Parts are packages in sealed tight plastic bags after a lag period of 24 hours. They were shipped to Mexico, so I know that things will be sketchy with the tempeture change, but any ideas would help me out.
Thanks in advance- AT
Nickel over 1008-1010 COLD Rolled Steel?
Parts are packages in sealed tight plastic bags after a lag period of 24 hours. They were shipped to Mexico, so I know that things will be sketchy with the tempeture change, but any ideas would help me out.
Thanks in advance- AT





RE: Electrolitic Nickel Rust
0.00015-.00025" (I presume) is only 4-6 microns; minimum thickness in ASTM B689 is 5 microns (Class 5). QQ-N-290A has nickel plating minimums 0.00020" for copper substrates, 0.00040" on steel.
Suggestions:
Verify proper pretreatment of the steel substrate, per ASTM B183.
Verify plating procedures.
Use thicker Ni.
Include porosity testing of the plated parts as part of your QC. See ASTM B689; simplest is the hot water test: Immerse the part in 85 oC water for 1 hour, blow dry with clean air & check for black spots & red rust.
Bag the parts while slightly warm using dried air. Dry N2 would be better.
RE: Electrolitic Nickel Rust
Is there a Cu flash under the Ni?
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RE: Electrolitic Nickel Rust