Acid-base corrosion--anti-corrosion coating protection

China Paint Online News Information
Guizhou chemical plant workshop staff found a leak in the transformation section of the pipeline, and then organized the company's safety maintenance personnel to the scene to view, and develop a treatment plan, shortly after, the transformation system sideline pipeline leakage gas suddenly occurred at the space explosion, resulting in 5 deaths, 6 injuries at the scene, estimated economic losses of about 5 million yuan. The harm caused by corrosion is multi-faceted, and most of the corrosion is from gradient to mutation, is a "chronic disease", not easy to attract people's attention, and so on accumulated to a certain extent to become a destructive accident, only to arouse people's concern. These few cases remind us that corrosion cannot be ignored. According to the material corrosion process corrosion can be divided into two categories, one is chemical corrosion, usually called oxidation, it is the metal surface in the absence of electrolyte corrosion, the other is electrochemical corrosion, it is in the case of electrolyte corrosion, usually electrochemical corrosion is more common.
ZS anticorrosive coating technicians concluded that the material corrosion, according to the form of material damage classification (1) material comprehensive corrosion: corrosion occurring on the entire metal surface is called total corrosion. It can be uniform or non-uniform corrosion. (2) Local corrosion of a material: the corrosion effect that occurs in a part of a metal or on one of its components is called local corrosion. The corrosion of this kind of material is manifested in speckle corrosion, ulcer corrosion, peeling corrosion, intercrystalline corrosion, tissue selective corrosion, etc. on the metal surface, which is more destructive to metal structure, equipment and instruments. (3) Stress corrosion of material materials: corrosion caused by stress is called stress corrosion. In severe cases, the metal breaks, the break can be along the crystal break, may also be the crystal break, this kind of corrosion can be divided into static corrosion.
the corrosion of heavy salts in the saline solution depends on the pH of the salt, the redoxity and the properties of certain ions, especially anions. The pH and redoxity of the salt solution determine the state of the metal material. The types of corrosive salts statistically counted in the anti-corrosion laboratory are: halide salts, which are often said to be chlorinated fluorinated salts, etc.;
acid corrosion refers to corrosion of metal materials in acid solutions. Its properties are hydrochemical corrosion, cathode reaction of 2H plus 2e→H2. Thermodynamically, increasing the acidity of the solution accelerates the cathode reaction and increases the corrosion rate, but the corrosion rate is also related to hydrogen over-the-maye. Anti-corrosion laboratory statistics acid corrosion involves inorganic acid, of which sulfuric acid, hydrochloric acid and nitric acid are the most important, organic acids in acetic acid, foric acid-based.
salt corrosion and acid corrosion, with the development of industrial technology, corrosion and corrosion protection are common in petrochemical, energy, power, metallurgy, aerospace and other fields. To meet the needs of the market, advance research and experimental development of salt-resistant and acid-resistant corrosion anti-corrosion coating technology, anti-corrosion effect is good, become the anti-corrosion industry's bright spot technology, and has salt-resistant acid anti-corrosion coating exclusive patented technology.
to use scientific and technological means to build a strong salt-resistant acid anti-corrosion coating, research and development can withstand 2300 degrees C high temperature corrosion-resistant ZS-811 high temperature anti-corrosion coating; ZS-822 composite ceramic high-temperature anti-corrosion coatings that can withstand corrosion of strong organic solvents and ultra-high temperature gases, ZS-1041 anti-corrosion coatings that can withstand the corrosion of high-temperature flue gas and flue gas condensate, and ZS-1041 anti-corrosion coatings that can withstand seawater and salt spray corrosion. S-711 inorganic anti-corrosion coatings, salt-resistant acid corrosion ZS-1031 under strong friction shock, ZS-821 ceramic anti-corrosion coatings resistant to ether, fluorine, oil erosion, etc., ZS resistant to strong oxidizing salts and acid corrosion -1032 anti-oxidation anti-corrosion coatings, resistant to sewage wastewater, methane, ethanol corrosion ZS-1034 acid-base anti-corrosion coatings, these various salt-resistant acid anti-corrosion coatings successful research and development, high scientific and technological content, wide application prospects, market prospects, also heavy anti-corrosion experts.
The main difference between salt-resistant acid anti-corrosion coatings and conventional anti-corrosion coatings is that their technical content is high, technical difficulties, his technology comes from the synthesis of high-resin resistance, the application of high-efficiency dispersants and fluidizers, the development of new anti-corrosion impermeable pigments and fillers, advanced and special test equipment and other supporting measures. The development of salt-resistant acid-resistant ZS anti-corrosion coatings also marks the development and upgrading of a company's scientific and technological technology level, technology leadership, anti-corrosion effect is good, salt-resistant acid anti-corrosion coatings have been far ahead of the domestic anti-corrosion coatings market.
economic losses caused by corrosion failure of materials include direct losses and indirect losses, including: replacement of equipment and components, repair and protection costs, etc.; Caused by loss, corrosion product accumulation or corrosion damage caused by reduced efficiency, corrosion products lead to the quality of the finished product, such as loss of compensation for environmental pollution and personal accidents, etc. , do a good job of material painting ZS anti-corrosion coating work, protect the long-term use of materials without corrosion.