High-temperature anti-corrosive pump wet etching and dry etching is what mean?

High-temperature anti-corrosive water pump wet etching and dry etching is what mean?

corrosion resistance to high temperature corrosion resistant water pump can be divided into two categories: wet etching and dry etching. Wet etching is refers to the corrosion of metallic materials under the presence of water, dry etching is one without the presence of liquid water in the dry gas corrosion. Due to generally contain water in the atmosphere, are often encountered in chemical and processing all kinds of aqueous solution, so wet etching is one of the most common, but the high temperature operation dry etching effects of also nots allow to ignore. industry contact is corrosion resistant pump selection first wet etching.

what do you mean by wet etching, metal corrosion is an electrochemical reaction in aqueous solution. In the metal surface to form a corrosion cell anode and cathode area isolation, lose electronic metal in solution, become positively charged ions, it is a process in anode oxidation process. At the same time in aqueous solution of the metal contact surface, electron has a lot of opportunities to be something in neutral solution and electronics is the reduction process, the process of the cathodic process. Common cathode process of aerobic reduction, reduction of hydrogen release, oxidant and precious metal deposits, etc.

with the corrosion process, in most cases, the cathode and anode process for solution ion barrier by corrosion products, led to the corrosion resistance and slow diffusion, the phenomenon is called polarization, slowing down the corrosion of metals with polarization.

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