The roughness after sand blasting should be controlled to an Ra value of about 2.0 Lm. In this way, the Ra value after plating is guaranteed to be 1.6Lm. After the blasting treatment, it is necessary to clean the surface of the roller body with clean compressed air. After the blasting of the roller body, the plating should be carried out within a time interval of not more than 2 hours. Before plating, pay attention to the preheating of the roller body to ensure the chrome plating adhesion on the chrome. Here, the chrome plating solution with the new chrome plating additive is used for electroplating, which is for the bright and dense plating of the hard chrome layer and the hardness requirement of the coating. The current density during electroplating is controlled at 3045A/dm2, which should not be too large to ensure crystal clearness and prevent defects such as pores and pinholes in the plating layer. After plating, the roller body should be cleaned in time and dried with clean hot water (water temperature above 60e) to ensure uniform color of the coating. The post-plating roughness was measured by the era TR200 hand-held roughness meter and the hardness was measured by a Japanese FM-700 semi-automated digital microhardness tester, which satisfies the design requirements of Ra value of 1.6Lm and HV value of 900.
Through this two-time palladium-plated chrome process, the technical requirements of the drawings for the electroplated layer are satisfied. Since the use in 2001, the coating performance is good, fully meeting the requirements of the chrome plating layer of the polyester production process. Practice has proved that ceramic coatings, electroplated pear chrome and other corrosion-resistant coatings have been successful in the manufacture of polyester staple fiber post-processing equipment. With the increasing proportion of chemical fiber products in the textile industry, the application prospects of these corrosion resistant and wear-resistant coatings will become more and more extensive.
(Finish)
Zirconium Wire,Pure Zirconium Bar,,Zr705 Zirconium Wire
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