Surface pretreatment by phosphate conversion coatings - A review

Sankara Narayanan, T S N (2005) Surface pretreatment by phosphate conversion coatings - A review. Reviews on Advanced Materials Science, 9 (2). pp. 130-177.

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Phosphating is the most widely used metal pretreatment process for the surface treatment and finishing of ferrous and non-ferrous metals. Due to its economy, speed of operation and ability to afford excellent corrosion resistance, wear resistance, adhesion and lubricative properties, it plays a significant role in the automobile, process and appliance industries. Though the process was initially developed as a simple method of preventing corrosion, the changing end uses of phosphated articles have forced the modification of the existing processes and development of innovative methods to substitute the conventional ones. To keep pace with the rapid changing need of the finishing systems, numerous modifications have been put forth in their development - both in the processing sequence as well as in the phosphating formulations. This review addresses the various aspects of phosphating in detail. In spite of the numerous modifications put forth on the deposition technologies to achieve different types of coatings and desirable properties such as improved corrosion resistance, wear resistance, etc., phosphate conversion coating still plays a vital part in the automobile, process and appliance industries.

Item Type:Article
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Uncontrolled Keywords:Crystal Impedance System; X-Ray-Fluorescence; Cold-Rolled Steel; Corrosion-Resistance; Titanium Phosphate; Electrogalvanized Steel; Electrochemical Method; Chemical-Stability; Failure Mechanisms; Hopeite Crystals
Divisions:NML Chennai
ID Code:3335
Deposited By:Sahu A K
Deposited On:14 Jul 2011 17:16
Last Modified:09 Feb 2012 10:51
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