It is important for phosphorized film to act as the first coating.It affects the quality of the coating system.A good phosphorized film provides good durability,aesthetics,anticorrosion and adhesion.In this article,the appearance defects of phosphorized film are described.The rea-sons leading to the uneven color and rust of the phosphorized film are analyzed by means of pro-cess parameters adjustment and modification.The film floating and rusting defects of the phospho-rized film are eliminated and the film quality is improved.
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