Metals coated with protective coatings of annealed...

B - Operations – Transporting – 05 – D

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117/113, 117/206

B05D 3/02 (2006.01) B05D 5/00 (2006.01) B05D 7/14 (2006.01) C09D 5/08 (2006.01)

Patent

CA 2009317

04- 21(476)A METALS COATED WITH PROTECTIVE COATINGS OF ANNEALED PERFLUORINATED CATION-EXCHANGE POLYMERS AND METHOD FOR MAKING SAME ABSTRACT OF THE DISCLOSURE A passive metal is coated with a perfluorocarbon copolymer cation-exchange polymer and subsequently annealed. The annealed polymer coating acts as a barrier to anions which attack and break- down the passivity mechanism of such passive metals, thereby pro- tecting the passive metals against localized corrosion, such as crevice or pitting corrosion, caused by anionic attack.

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