Metal influenced by the environment, by destructive against chemical or electrochemical reaction caused by the known corrosion, almost all metal products, in certain circumstances, there will be a number of patterns of corrosion, while the screw is metal products , they can not avoid the problem of metal corrosion, the environment and its use is not the same time, the corrosion phenomenon is also obvious differences. There are many polluting industries, such as steel, petrochemicals, power generation, etc., plus the recent steam locomotive substantial growth, a lot of exhaust emissions, the air is filled with sulfides and nitrides of corrosive gases and particulates, which are caused by The main reason for corrosion of metal. Metal corrosion current situation of discovery screws, bolts, structural steel and pipelines, its severity may have exceeded original estimates before the plant to form engineers must pay attention and priority issues. Corrosion can cause huge maintenance costs of the equipment and the severe economic losses as a result of corrosion and increase the design, manufacture, maintenance and repair costs, or even harm and disaster. Stainless steel screws standard range of the most widely used, has the largest number of demands, its ability to resist the merits of the decision of the durability of their use, have a significant impact on the safety and reliability of the equipment, so the study of corrosion prevention methods, development and application of modern corrosion technology, is currently an important issue. Corrosion of metal corrosion method there are four main methods that control the material itself, the use of the design environment, interface materials and the environment and improvement of metal structures, the use of a completely corrosion resistant alloys to produce screws, unless there are special needs, or In the economic point of view it is impractical, or surface corrosion participants screws completely isolated environmental factors, not necessarily feasible in practice, it may be very difficult. Improved metal structure designed to improve in some cases down to the impact of special circumstances, but most of the design of the screw can not be fully modified, and its protective effect nor permanent, so this method can not solve the problem, only at the interface of the corrosion , that surface corrosion treatment is currently the most widely used method. Anticorrosive surface treatment is the use of various methods of applying a protective layer on the metal surface, and its role is to isolate the metal and corrosive environments, in order to inhibit the production of the corrosion process, or reduce the corrosive medium in contact with the metal surface, and reach to prevent or corrosion mitigation purposes. The protective layer should be able to comply with the following requirements:... A corrosion resistance, wear resistance, high hardness, two compact, complete, small pores, 3 and base metal with a solid, good adhesion, four evenly distributed and there is a certain thickness. The protective layer is usually divided into two types of metal coatings and non-metallic coating, metal coating refers to a strong corrosion resistance in a metal or alloy corrosion-prone metal surface protective layer is formed, such coatings also known as coating. The method and type of metal coating produces a considerable number, which is the most common plating method, followed by molten metal-dip plating method (hot-dip plating), and chemical surface treatment. Non-metallic coating refers to an organic polymer materials such as paint, and inorganic materials such as ceramics, metal equipment or parts on the surface of the protective layer, the protective layer can base metal and the surrounding medium is completely isolated to prevent base metal corrosion due to exposure medium and cause corrosion. Eastern Taiwan-Hong stainless steel standard factory is specialized in titanium screws, stainless steel fasteners production and sales of integrated stainless steel standard factory, uphold the integrity of operations, quality, keep promises, the quality of survival, seeking to carry out. User's needs is our quest.