Arthur S. Kushner Consultant
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Plating Palladium Over Silver
We have been asked to plate palladium over silver. The silver is on an aluminum substrate. Can you give us any suggestions on how to do this?
Read MoreElectropolishing and Rinsing
Our company specializes in the electropolishing of stainless steel. We continually have a problem with staining after the final rinse step. Do you have any suggestions as to what we should do to eliminate the staining?
Read MoreA Packaging Problem
One of the problems we face is that during shipment some of these finishes are damaged from the jostling and vibration caused by transportation to various parts of the world. What type of packaging can we use to reduce damage to the parts?
Read MorePeeling and Chipping Nickel
We have a manual nickel plating line. We periodically lose power in certain portions of the tank and/or have a very low rate of plating. We also have problems with chipping and peeling of our parts. Do you think there is any correlation between the electrical problems and the chipping and peeling of parts?
Read MoreBarrel and Rack Silver Plating
Are there any differences in the quality of the silver plate that you obtain from barrel and rack plating?
Read MoreBumpy Nickel Plating
We have a problem with bumps and roughness in our nickel sulfamate plating bath. We are convinced that particulate matter in the bath is causing this problem. We bag our anodes and continuously filter the plating solution. What else can we do to eliminate this problem?
Read MoreBlast Media
We recently changed our blast media from steel to alumina. We now find that the blasted areas of the parts do not plate. We also find that if we skip the acid dip step the parts will plate okay. What’s going on?
Read MoreHard Chrome or Electroless Nickel?
One of my fellow engineers has suggested that electroless nickel can be substituted in most cases for hard chrome. What are your thoughts on this?
Read MorePorous Deposits
Can you give me some general guidelines for reducing porosity in our plated deposits?
Read MoreBlack Oxide Problem
We find that 30–40% of the tools show salt bleed-out at the joints. Can you suggest anything we can do to solve this problem?
Read MoreBulk Electropolishing
Is there any way to bulk electropolish smaller parts? We have received requests to electropolish parts that are small and difficult to individually rack. We were thinking of using a barrel technique to do this. Will it work?
Read MoreMore On Barrel Sulfamate Nickel
We normally operate the plating bath in a temperature range of 50–60°C. Recently the temperature was allowed to reach 70°C due to a broken thermostat. Since the temperature upset, our plating has been pitted, burnt and stressed. Did we ruin the plating bath because of this temperature upset? Can the plating bath be salvaged?
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