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EN On Carbon Steel
Do you have a process for plating low-carbon steel with a high-phosphorus electroless nickel?
Read MoreBlisters Everywhere
We purchase zinc plated electronic enclosures from an offshore company. We periodically have problems with blistering when the parts are subjected to burn in. We did not seem to have this type of problem when the enclosures were plated domestically. Short of bringing production back to the U.S., what can we do to minimize or eliminate this problem?
Read MoreTrivalent Chromates Revisited
I normally do not write about recent papers in the technical literature. However, a paper that appeared in the October issue of Plating and Surface Finishing was of great interest and requires wider distribution. The paper, “Unexpected Results from Corrosion Testing of Trivalent Passivates,” by T. Rochester & Z. W. Kennedy, discusses results using one of the standard tests for the presence of hexavalent chromium.
Read MoreSulfate Nickel & Chloride Revisited
Is it necessary to have chloride in our sulfamate nickel plating bath?
Read MoreBlisters on Aluminum
After silver plating machined aluminum we test the parts by heating to 175oC for one hour. During the soldering step a good percentage of the parts blister. Do you have any suggestions for eliminating this problem?
Read MoreTesting Passive Surfaces
What is the standard procedure for determining if the surface of a stainless steel part is passive?
Read MoreType 416 Stainless Steel and Adhesion
After plating we observe blistering and peeling. We have tried a number of different plating cycles without ant success. What do you suggest?
Read MoreCadmium Plate Turns Black
We are currently cadmium-plating fasteners in a cyanide bath and are finding that the finish turns black after four to six days. Parts come out of the process more or less bright white. After the cadmium plate we rinse and apply a chromate, rinse and dry. One fastener is a little yellowish after a couple of weeks, but the others that are black were plated only four days ago. Can you make any suggestions as to how to solve this problem?
Read MoreAlkaline Zinc and Polarized Anodes
Our anodes polarize when we run the line. What is causing this, and how can we prevent the problem from occurring?
Read MorePlating On Commercially Pure Titanium
Our company has been asked to develop a procedure for plating on commercially pure titanium. Can you give me a procedure for this process?
Read MoreTrivalent Chromates
One of the tried and true testing methods for hexavalent chromium is the use of 1,5-diphenylcarbazide to form a colored complex with hexavalent chromium. The intensity of the color is measured colorimetrically. The colored complex does not form with trivalent chromium. Why has the test taken on added significance?
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