麻花豆星空天美糖心mv-星麻花传媒mv-星空天美梦幻mv免费-天美麻花星空果冻mv-62星空天美梦幻糖心mv-天美电影免费在线观看Pure iron is a kind of metallic crystal with silvery metallic texture. Generally, it is dark gray to gray black, and the color of high-purity fine iron wire is amorphous fine sand or powder. It has excellent plasticity, conductivity and heat transfer performance, and has strong ferromagnetic materials, belonging to permanent magnetic materials. At normal temperature, iron in dry gas is not easy to react with non-metallic elements such as oxygen, sulfur, chlorine and so on. If there is residue in aluminum iron big cap rivet, it is easy to rust in wet and cold gas, and corrosion is faster in humid air with acid, alkali or salt aqueous solution.

麻花豆星空天美糖心mv-星麻花传媒mv-星空天美梦幻mv免费-天美麻花星空果冻mv-62星空天美梦幻糖心mv-天美电影免费在线观看To put it bluntly, iron bolts are forged from iron, so they have excellent plasticity, conductivity, heat transfer and obvious magnetism. The difference between iron bolts and stainless steel rivets, aluminum bolts and copper bolts requires only a small magnet. However, the outstanding problem of iron bolts is that they are not resistant to corrosion. If the surface of the bolts is not covered with a layer of maintenance oil, the stainless steel inner locking wire drawing rivets can be completely eroded in a few minutes. Therefore, all the iron bolts in the foundation can not be separated from the relative metal surface treatment. The iron bolts can be electroplated with nickel, white zinc, blue zinc, black zinc, color zinc, copper plating, stainless steel, etc OHS test.

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