Plastic plating-Electroplating products used in food processing industry.
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The food processing industry provides a huge potential market for the application of electroless nickel plating, which is called the potential market because of the obstacles in the wide application of electroless nickel plating in the food industry. For example, in the United States, FDA (United States Food and Drug Administration) has not yet formulated regulatory standards for the application of electroless nickel plating in the food industry; in general, FDA approves the application of electroless nickel plating in direct contact with food on a case-by-case basis. The main reason is that the classical electroless plating bath contains toxic heavy metal ions such as lead and cadmium as stabilizers. However, many modern electroless nickel plating solutions no longer use heavy metal ions as stabilizers; it is clear that this barrier will be removed sooner or later. At present, the parts in food packaging machinery that are not in direct contact with food, such as bearings, rollers, conveyor belts, hydraulic systems and gears, are typical applications of electroless nickel plating in the food industry.
In the process of food processing, it will involve salt water, nitrite, citric acid, acetic acid, natural wood fumigation, volatile organic acids and other corrosion media; food processing temperature range is 60 to 200, the relative humidity in the production environment is very high;
under such conditions, food processing equipment has problems such as metal corrosion, fatigue and wear. For the metal surface in contact with food, the traditional protection method is electroplating hard chromium; however, in the acidic medium containing chloride ion, the corrosion resistance of chromium plating is not good; however, electroless nickel plating has obvious advantages in uniform plating ability, high corrosion resistance, anti-adhesion, demoulding and so on. The electroless nickel plating used in the parts in contact with food on the kneading machine is one of the successful examples; others are used in food inflatable canning machine, screw feeder, mixing pot, food mold, baking tray, drying oven, the more electroless nickel plating is used in food machinery such as bread incubator.
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