Arthur S. Kushner Consultant
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Gold Solderability Problems
We occasionally have problems with dewetting of our pure gold plating during the soldering step. The parts we plate are thin, made of copper and have a sulfamate nickel strike on them. Do you have any suggestions on how we might solve this problem?
Read MoreAnother Citric Acid Passivation Question
We are having a problem with citric acid passivation of 303 stainless steel. The parts continue to fail a 24-hour salt spray test. Currently we passivate for 30 min. Should we double the amount of time in the citric acid? Do you have any suggestions for us?
Read MoreCadmium Plating Of The Stainless Steel Bolts
I have recently been asked to cadmium plate stainless steel bolts. Do you have a process that you can recommend?
Read MoreNickel and Stress
I need some basic information on stress in nickel deposits. Can you recommend some sources?
Read MoreElectroless Nickel and Magnetism
We apply electroless nickel to a number of different steel substrates. We routinely demagnetize the parts before placing them in the plating bath. Recently one of our chemical vendors suggested that we were wasting money by doing this since electroless nickel does not seem to be harmed by magnetic substrates. What are your thoughts?
Read MorePitted Copper
We use a copper sulfate plating bath. We recently have been observing pitting in the copper deposits. Do you have any suggestions for solving this problem?
Read MoreFinger Prints on Zinc Plating
We supply zinc plated components to a number of different industries. We do not do the actual plating but rely on outside vendors. Frequently, we will receive plated parts from our vendors with fingerprints spotting and dull areas. Do you have any suggestions and how we can reduce the number of rejected parts?
Read MorePlating on Aluminum Again
Our plating shop does a lot of plating on aluminum. We always seem to have problems with blistering. When we remove some of the blisters to examine the defect, it appears that the zincate layer is at fault. Do you have any suggestions on how we can improve our zincating process?
Read MoreSome More Blackening Problems
Our shop specializes in blackening of 300 and 400 series stainless steel. We sporadically have trouble with smut, staining and color differences on the parts. What can we do to minimize these problems?
Read MoreRestoring Zinc And Pot Metal Castings
How do you restore old zinc or pot metal castings used on classic automobiles?
Read MoreLayers Of Nickel
Our company barrel plates small components using a nickel sulfamate plating bath. The bath also contains a small amounts of nickel bromide. The problem we have is the nickel appears to be layered and tends to delaminate during subsequent processing. Do you have any suggestions for solving this problem?
Read MoreLittle Used EN Bath
The EN solution is not used very often. We find that after a long period of non-use a scum-like material forms on the surface. Do you have any suggestions and how this can be prevented?
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