Chemical pump corrosion resistance identification Chemical pump in most cases are exposed to corrosive media, so its corrosion-resistant pump performance is particularly important. Let's first look at the metal corrosion information. Metal corrosion patterns can be divided into three categories: â‘ film corrosion, large areas on the metal corrosion, the surface will generate a layer of dense tissue passivation film, played a hinder corrosion, played a protective role. â‘¡ no film corrosion, compared with the film corrosion, no more comprehensive film corrosion more dangerous, it maintains a certain speed unobstructed to conduct a comprehensive corrosion. â‘¢ local corrosion, according to the survey, the corrosion of chemical equipment in the local corrosion accounted for 70%. And there are many forms of local corrosion, such as crevice corrosion, intergranular corrosion and stress corrosion and so on. Corrosion resistance of metal can refer to the following two standards: According to the "Petrochemical Enterprises Pipeline Design Equipment Selection Rules" provides that the corrosion of metal materials can be divided into the following four categories: annual corrosion rate of not more than 0.05mm material is fully resistant Corrosive materials. The annual corrosion rate of 0.05 ~ 0.1mm material is corrosion-resistant materials. The annual corrosion rate of 0.1 ~ 0.5mm material is still corrosion-resistant materials. Corrosion rate of more than 0.5mm material is non-corrosive materials. â‘¡ According to "Metal Corrosion Prevention Manual," the provisions of the corrosion resistance of metal materials can be divided into 10 grades: the annual corrosion rate of not more than 0.001mm, corrosion resistance grade of 1, showing complete corrosion resistance. Annual corrosion rate of 0.001 ~ 0.005mm, corrosion resistance grade of 2, showed very corrosion-resistant. Annual corrosion rate of 0.005 ~ 0.01mm, corrosion resistance grade of 3, showed very corrosion-resistant. Annual corrosion rate of 0.01 ~ 0.05mm, corrosion resistance grade of 4, showing corrosion resistance. Annual corrosion rate of 0.05 ~ 0.1mm, corrosion resistance grade of 5, the performance of corrosion-resistant. The annual corrosion rate of 0.1 ~ 0.5mm, corrosion resistance grade of 6, showed corrosion resistance. The annual corrosion rate of 0.5 ~ 1.0mm, corrosion resistance level of 7, the performance is still resistant to corrosion. Annual corrosion rate of 1.0 ~ 5.0mm, corrosion resistance grade of 8, showed less corrosion-resistant. Annual corrosion rate of 5.0 ~ 10.0mm, corrosion resistance grade of 9, showed less resistant to corrosion. Annual corrosion rate of more than 10.0mm, corrosion resistance grade of 10, showed no corrosion resistance. Based on the above information, we can determine the corrosion resistance of the metal material what exactly, in particular, chemical companies should be extra careful not to buy chemical pump to buy fake and shoddy products without the knowledge, when the huge losses caused by everything late It's
Fluorescent Dyes have long been used mainly for the dyeing of flat materials, especially textiles. The use of fluorescent dyes causes a significant increase in color brightness, which makes the dyed materials more easily perceptible, or more accurately visible. Indeed, fluorescent dyes are considered to be those dyes which absorb and emit radiation in the visible spectral range light and causes fluorescence. These dyes are defined as a group of organic dyestuffs which, when applied to a textile material, give rise to fluorescence under UV radiation and in daylight. In the textile field, the main use of fluorescent dyes is in the coloration of synthetic fibers, especially polyester, polyamide and acrylics in conjunction with elastane fibers, for fashion, leisure, sportswear uses and especially for safety. In industry, many textile materials are dyed with mixtures of dyes to achieve the exact reproducibility of the required color. The use of two or three fluorescent dyes with non-identical properties can affect the sorption of the dye and the high visibility.
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