文档介绍：不锈钢酸洗钝化的方法与工艺(Method and process of pickling passivation of stainless steel)
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Stainless steel pickling passivation method and process 1 pickling passivation treatment method, stainless steel equipment and parts pickling passivation treatment according to different methods of operation, its scope of application and characteristics are shown in table 1. Table parison of pickling passivation methods for stainless steel
Method of impregnation brush paste method system circulation circulation system of electrochemical method can be used for parts, and can be used to brush field equipment surface treatment technology plex, for DC power supply or potentiostat scope but not suitable for large equipment for large equipment inside and outside surface and local treatment for the installation or maintenance of the scene, especially for welding department of manual operation and poor working conditions, high production cost spraying method for large equipment, such as heat exchanger, shell and tube processing has the advantages of convenient construction, acid solution can be reused, but the piping and the pump is connected with the advantages and disadvantages of low; a large volume of equipment with acid impregnation liquid consumption of too much manual operation, poor working conditions, acid the liquid can
not be recycled for on-site installation, large container with liquid quantity is low, low cost, fast speed, but the need to configure a spray gun and a ring can be used in cutting Pickling bath or passivation tank parts, pickling liquid can be used for a long time, high production efficiency, cost
2 acid passivation formula examples of general treatment (1) acid reagent HNO3 6% ~ 25%+HF % ~ 8% (volume fraction); temperature 21 to 60 DEG C; the time according to the need; or a