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,Drilling pipe process and appliance industries. Tank main features, 316-L stainless steel material. Chemical resistant. Mobile. Intelligent trickle heating process. Suitable for dipping & spray operation. Suitable for drill pipes, collars, Subs, Flange & other oil field products. Swedish nickel chrome with ceramic heaters. Excellent isolation. Sandwich panel of fiber ceramic & stainless steel sheets. Excellent thermal efficiency. Centrifugal pump 316-L stainless steel with 700L/M Capacity(-10Cto+110C). filling draining and circulation through pump. Controlled pressure corrosion resistant
Phosphating process can be defined as the treatment of a metal surface so as to give a reasonably hard, electrically non-conducting surface coating of insoluble phosphate which is contiguous and highly adherent to the underlying metal and is considerably more absorptive than the metal . The coating is formed as a result of a topochemical reaction, which causes the surface of the base metal to integrate itself as a part of the corrosion resistant film.