Metals & Chemicals

Chromate Conversion on Houston like Alodine or Iridite is a chemical treatment for aluminum used to present corrosion protection and also surface preparation for paint and other adhesives. Chromate is a superb treatment for paint or adhesives as it greatly enhances the product's ability inorder to form a bond with the aluminum. It is often used on electrical and electronic equipment as it provides increased corrosion resistance even as remaining electrically conductive. The oxide film formed by this process varies in color, depending on the aluminum alloy that is being treated, surface conditions, and type of chromate. The key benefits of alodine are. 1. It resists corrosion. It is indicated that the alodine treated surface withstands corrosion in a five percent of salt spray test for 168 hours. Results vary depending on the alloy of the material and surface finish. 2. Alodine is an outstanding paint base. As the coating is not applied electrically and could be applied quickly,...

In the chromate conversion process, part of the metal surface is converted to a superficial layer containing a complex combination of chromium compounds. The chromate film will be soft when freshly formed, but once it gets dried and aged, the layer becomes more rough resistant. Chromate conversion coatings provide excellent corrosion resistance. Paint, polish, and organic finishes will bond exceedingly well to chromate conversion coatings. Additionally, the chromate coatings will prevent loss of plain adhesion due to under film corrosion. The most common use for chromating is to impart corrosion resistance to zinc aluminium parts and zinc plated steel. These films will vary in color depending upon the chemicals being used and the bottom metal being coated. Colors vary from clear, to light shining, to gold. Greater corrosion protection is given with formulations that gives a golden color, since these coatings tends to be thicker. A multicolored appearance will be obtained when the b...