Brown stains on copy cad parts?? why??

[MrPontiac]

I just ordered new anodes because mine are worn in half, But recantly i seem to be picking up some brown stains towards the outside edges, cannot figure this, im running 1.2 amps with .7 volts on the rear flaps of my carb. I first glassbeaded the parts then polished them to a high luster on a cooper colored wire wheel, after that i soaked the part in 160 degree degreaser then imediately put the parts in my copy cad bath for 4 min. after rinsing off in distilled water i go to the yellow, i really never had a problem before, could it be the anodes?? Extremely thin and weak towards the ends and the anodes are worn to a football shape. ANY IDEAS? P.S. i never heat my copy cad solution because im outside in the sunlight and fill the sun is heating up the eletro. for me.

[Caswellplating_Jason]

Re: Brown stains on copy cad parts?? why??

You should plate for 20 min. @ .13 to .14 amps per sq. in.
After degreasing you should etch the part in 5% muriatic acid / distilled water for 10 sec....double rinse.....plate for 20 min....etch for 10 sec. again....double rinse...go to chromate ...double rinse....dry with hot air.

[MrPontiac]

Re: Brown stains on copy cad parts?? why??

I will try this method, Thanks for your reply!! Rich

[MrPontiac]

Re: Brown stains on copy cad parts?? why??

bert i was doing the opposite, mauratic acid bath then degreasing then plating.

[Caswellplating_Jason]

Re: Brown stains on copy cad parts?? why??

Have you tried it the correct way? If so, how did you make out? Also, relace those anodes if you already have'nt.