Precautions For Fastener Anti-Corrosion Maintenance Layer
The fastener anti-corrosion maintenance layer is a point that needs to be paid attention to in the fastener industry. Perhaps many people are interested but do not know much about it. As a professional fastener manufacturer, Xinchi Fastener Company will be happy to introduce the precautions on the fastener anti-corrosion maintenance layer.
Stainless steel fasteners are also made of metal and metal corrosion prevention methods mainly have four aspects, that is, the nature of the material itself, the use of the environment, data and environment interface and improve the design of the metal structure.
It is economically impractical to manufacture stainless steel fasteners with complete corrosion-resistant alloys unless there is a specific demand for them. It is not feasible in practice and may be very difficult to completely isolate the outer surface of the fastener from the environmental elements that will cause corrosion. Improving the design of metal structures can ameliorate the influence of special conditions in certain situations, but the design of most stainless steel fasteners cannot be adequately corrected, and its maintenance function is not permanent, so this method cannot basically solve the problem. Only in the interface of the fastener corrosion prevention, that is, the surface corrosion prevention treatment is widely used at present.
Definition and function of anti-corrosive coating for stainless steel fasteners
Corrosion prevention treatment of stainless steel fasteners refers to the use of various methods to apply a maintenance layer on the metal surface, its role is to isolate the metal from the corrosive environment, in order to suppress the corrosion process, or reduce the corrosive medium and the metal surface contact, and to avoid or reduce corrosion.
The stainless steel fastener maintenance layer shall meet the requirements.
- The stainless steel fastener maintenance layer should be corrosion-resistant, wear-resistant, and have high hardness.
- The maintenance layer of stainless steel fasteners should be tightly constructed, intact, and with small pores.
- The maintenance layer of the stainless steel fastener has strong separation and good adhesion from the base metal.
- Maintenance layers of stainless steel fasteners shall be evenly spread and of a certain thickness.
Classification of maintenance layers for stainless steel fasteners
The maintenance layer of stainless steel fasteners is usually divided into the metal coating and non-metal coating. Metal coating refers to the use of strong corrosion resistance of metal or alloy on the easy corrosion of metal surface to form a maintenance layer, which is also called coating. There are many methods and varieties to produce metal coating, among which the common method is electroplating, followed by the molten metal dip plating method (hot dip plating) and chemical surface treatment. Non-metallic coating refers to the use of organic polymer materials, such as paint, and inorganic materials, such as ceramics, to form a maintenance layer on the surface of metal equipment or parts. The maintenance layer can completely isolate the base metal from the environmental medium to avoid corrosion of the base metal due to contact corrosion in the stainless steel standard part medium.
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