Phosphate Coating: Zinc, Iron or Manganese Phosphate

Phosphate coating is the treatment of castings, iron, steel or steel-based substrates with a solution, whereby the surface of the metal is converted to an integral, mildly protective layer of insoluble crystalline. Phosphating is considered the heart of pretreatment operations; it is here that the top surface of the metal is converted into a highly insoluble, corrosion-resistant coating that provides the primary bond between substrates and the next process. There are several phosphate processes:
Iron Phosphate produces coatings with course to fine crystals providing a receptive surface for the bonding of other applications and is useful where corrosion protection requirements are not of the highest levels.
Zinc Phosphate may be used as a base for Paint or for increasing wear resistance, or rust proofing, and provides inherently better corrosion resistance than iron.
Manganese Phosphate is applied chiefly to ferrous parts (Internal combustion engine parts for example) for break-in and to prevent galling and are mostly used as an oil base. Our ability to meet your production requirements and delivery needs are enhanced by 2-Manaully Operated lines, experienced personnel and processes conforming to TT-C-490 types I, II and IV as well as DOD-P-16232. E-mail us: sales@unitedplating.com