Today, let's follow Xiaobian's steps to learn more about the corrosion characteristics of potassium hydroxide. I hope the sharing of Xiaobian can make you better understand potassium hydroxide.
1、 The corrosion characteristics of potassium hydroxide are as follows
Average corrosion is one of the common corrosion forms of potassium hydroxide industrial consumption equipment, and is the fundamental form of electrochemical corrosion. It stops on the surface of all exposed media, the metal thins on average, and the weight gradually decreases.
Graphitization corrosion is that graphite in ordinary cast iron is dispersed in ferrite with network shape, and ferrite selective corrosion occurs in salt water, mineral water, soil or extremely dilute acid solution.
Wear corrosion is caused by the relative movement of corrosion fluid and metal surface, which leads to the accelerated destruction of metal. It is the result of joint or alternating stop of corrosion and wear, chemical action and mechanical action. The severe level of corrosion is far beyond the single corrosion process. Gas, liquid and solid coexist in the consumption of fluid. The corrosion in soda ash plant is usually erosion corrosion, impact corrosion and cavitation corrosion.
Erosion corrosion, also known as inlet pipe corrosion, is mainly concentrated at the inlet end of heat exchange tube. The main reason is that the fluid enters into the pipe with small cross-section from large section, and the turbulence and crystal particles entrained stop scouring the pipe end violently, and the tube end is quickly eroded through. The reason of potassium hydroxide impact corrosion is a kind of wear corrosion produced in higher flow rate. Cavitation corrosion, also known as cavitation corrosion, is caused by the composition and disillusionment of steam bubbles. It is caused by the geometric shape of metal equipment that can not meet the requirements of flow mechanics. Part of the vortex is generated, and the gas is disillusioned at high pressure, resulting in shock wave. Small hole and crevice corrosion is an electrochemical corrosion form of a part that produces small holes or gaps on the surface of metal State.