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Causes and solutions of rust of high-pressure ball valves
High-pressure ball valve refers to a high-pressure valve in which the opening and closing parts (balls) are driven by the valve stem and rotate around the axis of the valve stem. Used in hydraulic machinery and equipment, hydraulic switches, natural gas, etc., high-pressure ball valves came out in the 50s of the 20th century, with the rapid development of science and technology, the continuous improvement of production technology and product structure, in just 40 years, has rapidly developed into a major valve.
First, the cause of rust of high-pressure ball valve
To verify whether the high-pressure ball valve can rust, you can first place the same high-pressure valve in different environments to verify and contrast, in general, if the high-pressure ball valve is placed in a relatively dry environment, after a long time, the high-pressure valve is not only intact, but also not rusted, but if the high-pressure valve is placed in seawater containing a large amount of salt, it will rust in a few days, it can be seen that the corrosion resistance and rustlessness of the high-pressure ball valve also need to be limited by the use environment. In addition, from the characteristics of the high-pressure ball valve itself, it is stainless because there is a layer of chromium-rich oxide film on its surface to prevent particles such as oxygen atoms from the outside from causing invasion damage to the object, so that it has the characteristics of stainless steel, but when the film is damaged by environmental factors and other factors, as oxygen atoms enter and iron ions are freed out, the high-pressure ball valve will produce rust.
Destroy the surface film of high-pressure ball valve, causing many reasons for rust, some is that the membrane and other metal element particles or dust have an electrochemical reaction, and at the same time with the help of humid air as a medium, the formation of a microbattery cycle, so that the stainless steel surface rust, can also be stainless steel surface film direct contact with strong acid, strong alkali and other corrosive liquids, caused by corrosion, etc., so to say that in order to high-pressure ball valve does not rust, in daily use should also pay attention to the cleanliness of the object, keep the surface of the high-pressure valve clean.
Second, the solution to rust of high-pressure ball valve
So how to ensure that the metal surface is permanently bright and not corroded?
1. The decorative stainless steel surface must be cleaned and scrubbed frequently, remove adhesions, and eliminate external factors that trigger modification.
2. Use 316 stainless steel, 316 can resist seawater corrosion.
3. The chemical composition of some stainless steel pipes on the market cannot meet the corresponding national standards and cannot meet the 304 material requirements. Therefore, it will also cause rust, which requires users to carefully choose the products of reputable manufacturers Construction and construction precautions In order to prevent scratches and pollutants adhesion during construction, stainless steel construction is carried out under the film state. However, with the extension of time, the residue of the paste liquid should be used according to the shelf life of the film, and the surface should be washed when the film is removed after construction, and special stainless steel tools should be used, and when cleaning utilities with general steel, in order not to let iron filings stick to should be cleaned. Care should be taken not to let the highly corrosive magnetic and stone cleaning drugs contact the stainless steel surface, and wash immediately when in contact. After the construction is completed, the neutral detergent and water should be used to wash the cement, dust and other substances attached to the surface.
