How to avoid surface corrosion of medical device springs?Connector Processor

　　How to avoid surface corrosion of medical device springs? Generally, a metal protective layer is obtained by surface treatment and electroplating. This electroplating protective layer can not only avoid corrosion, but also make the entire medical device spring look more beautiful. So let's learn more about why medical device springs need surface treatment.

　　When the medical device spring is electroplated on metal, it can also improve the working performance of the spring, such as: increasing the surface hardness of the spring, increasing the anti-wear force of the spring, improving the thermal stability of the medical device spring, and preventing spring ray corrosion. However, if it is purely for the corrosion of medical device springs, the electro-galvanized layer and the electro-plated cadmium layer should generally be used.

　　Zinc is relatively stable in dry air, hardly changes, and is not easy to change color. A white film of zinc oxide or carbon zinc carbonate will form in humid air. This dense film prevents the spring from continuing to corrode. Therefore, the galvanized layer is used as a corrosion protection layer for springs under normal atmospheric conditions. All springs that come into contact with solutions such as sulfuric acid, hydrochloric acid, and caustic soda, and work in humid air in an atmosphere such as sulfur trioxide, should not be plated with zinc.

　　The cadmium-plated layer is brighter and more beautiful than the zinc-plated layer, softer, and has better plasticity than zinc, and the cadmium-plated layer has less hydrogen embrittlement. However, cadmium is scarce, expensive, and highly toxic, causing serious environmental pollution. Therefore, it is restricted in use. Most springs used only in the aviation, marine and electronic industries use cadmium plating as a protective layer.

　　In addition to the above-mentioned zinc and cadmium plating, the metal protective layer of medical device springs also includes copper plating, chrome plating, nickel plating, tin plating, silver plating, galvanized titanium alloy, etc. The spring designer can choose according to the occasion of the spring. coating.

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