Please combine the chemical composition of loess, red soil and black soil in China. What are the differences in corrosion of metal materials? Thank you. There is a reward for high marks.

Corrosion in a broad sense refers to the phenomenon that the function of materials is damaged due to the chemical or electrochemical interaction between materials and the environment. In a narrow sense, corrosion refers to the physical and chemical interaction between metal and environment, which changes the performance of metal and leads to the damage of metal, environment and its composition and function.

Loess: formed by silt deposited by impact fan. Because of its high water content, it corrodes metal materials seriously.

Red soil: It is original ecological soil, with dry soil composition and low water content, and does not corrode metal materials seriously.

Black soil: It is formed by deposition of river bed or lake, and it corrodes metal materials seriously.

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