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Phosphating of oil and gas pipe for offshore
My company is specialized in fluorocoatings (powdercoating) and wants to set up a phosphating plant for steel items used in oil and gas off-shore industry. Which process wil be the best one? Zinc, manganese, other? bath? spraying? any helpfull tips are welcomeMarta Borys
Plating shop employee - Denmark
Manganese phosphating is generally for oil-retention for machine parts, Marta. Zinc phosphatizing in a 7-step process would be my vote. However, proprietary zinc phosphates, perhaps calcium-modified or otherwise modified, will probably be superior to a generic handbook-formulated phosphate.
Spraying is generally accepted as slightly superior because of the mechanical energy of the impingement. However, you might want to consider integrating the phosphatizing with e-coating and, in that case, logistics would probably dictate that the phosphatizing be done by immersion because the e-coating will be.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
February 11, 2008
The manganise phosphating especialy for oil & gas applications.
- U.A.E, Ajman