Letter 2074

Etching on electropolished steelparts.

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In our company we are experiencing big problems with etchings on steelparts which have been electropolished. Here is roughly what process the material goes through:

1: Steel parts are being cut into shape by CNC-machinery.

2: The parts are being degreased in alkaline solution.

3: Additional welding and cutting on the parts are performed.

4: Second time degreasing in alkaline solution.

5: Pickling in H2SO4/NaCl solution followed by electropolishing. ETCHING!!!

One of our puzzles to solve is that when the parts are being degreased in trichloroethylene we have no problems

Hans Henrik Larsen
Micro Matic A/S - Odense, Denmark

Can anybody help me? I am a student and need to know what hazards are associated with welding alloys such as stainless steel and aluminium. Any information would be gratefully appreciated. Many thanks... Regards Brodie

Brodie Biffin

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