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Pretreatments
What is the chemical used to seal after a three-stage cleaning process and higher?
Read MoreRepainting Warehouse Racks
We recently have been asked to repaint old warehouse racks. Is there a good, easily available chemical to clean them before we paint them with an industrial paint? Do we need to prime them before we paint them?
Read MoreTesting Passive Surfaces
What is the standard procedure for determining if the surface of a stainless steel part is passive?
Read MorePassivation of 17-4ph Stainless
In response to your Article “Passivation before Heat Treatment” in October 2007: Your second paragraph states “If the atmosphere in the furnace... etc”. Stainless steel should never be heat treated in an atmosphere.
Read MorePainting and Finishing
I am in the business of reconditioning, repairing and customizing guitars. I am painting some of them and I require some advice on finishing the job. I have read that now I need a clear coat finish to complete the job, especially on metallic-type paints. Here are my current questions and concerns: 1) Can I use a spray style of clear coat? 2) Is sanding required before application of clear coat? 3) How critical is cure time for the clear coat? 4) Do I wet sand clear coat to obtain a high gloss finish, or is this obtained another way with polishing/rubbing compounds?
Read MoreTechnical Help
Recently we bought a shipment of white louvers for residential electric heaters from an off-shore supplier. Unfortunately, the paint used on the louvers by the off-shore plant is not up to that standard, so the louvers turn from white to brown where the heat comes out in the electric heater unit. How do we correct the problem? How many choices do we have? What is the easiest and least costly way, relatively speaking?
Read MorePhosphating Process
We are in the process of setting up a pretreatment plant, and would like to know which phosphating process will be best, considering quality, investment, and maintenance for: 1) room temperature dicationic process, 2) tricationic process, and 3)high-temperature dicatonic process.
Read MoreThen Came the Plant Tour
When it comes to winning new business, Actions speak louder than words
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?
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