[hdway]

Sean
I have a 25 amp rectifier and think that I got the plating on the parts OK but maybe not, after the muratic pickle mainly used to clean the cad plate grey on the parts I rinsed with distilled water sprayed liberly over the basket of parts but may still of had muratic on them I did get a start on black cnromate but was poor. Eventally I abandoned the basket and tried one bolt it has so much zinc on it now that the nut won't screw on still can not get anything but a yellow tint, if the black chromate gets contaminated so esily how can you get any amount of items chromated with out replacing the bath. What about the particals of white in the bottom of the chromate are they suppose to br there? When my chromate settled overnight it cleared up. Will the sulphuric acid affect the bath as much or is it compatable with the sulphur base?
Have aranged to get some nitric acid and sulphuric should have it tonight the problem is the quantity I would have to buy, the only nitric supplier has minimum 75.00 sale and can only find sulphuric at NAPA in 20 litre don't want to store it in my shop as you always get some fumes leaching out and it is -35 C here so it freezes in my machine shed. As far as the rinses I don't like the distilled water spray would rater give it a quick rinse with the softened water in my sink and then spray with distilled.
Appreciate any help you can give as I have bolts to get chromated so I can get my car back together and it takes me two weeks by the time I get supplies from Caswell, will be ordering there blue chromate for my cad finish after looking at your pictures.