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How to choose the material for different concentrations of nitric acid storage tanks?

Time: 2018-07-12 17:32 Source: unknown Author: chuguan click: Times
Nitric acid is highly oxidizing, volatile, and highly corrosive. It is a monobasic inorganic strong acid, a colorless transparent liquid, and has an asphyxiating odor. It is an important chemical raw material. Dyes and salts. China began to produce nitric acid in 1935, and then developed slowly due to some reasons. By the 1980s and 1990s, the nitric acid industry developed.

Nitric acid is highly oxidizing, volatile, and highly corrosive. It is a monobasic inorganic strong acid, a colorless transparent liquid, and has an asphyxiating odor. It is an important chemical raw material. Dyes and salts. China started to produce nitric acid in 1935, and then developed slowly due to some reasons. The development of the nitric acid industry began to accelerate in the 1980s and 1990s. After 2000, China's nitric acid industry entered a period of rapid development, with an annual total output of more than 18 The rate of growth has been rapidly increasing. There are more than 60 manufacturers of various types and scales. Some companies have production processes that are close to foreign levels. The concentration of commercially available ordinary reagent grade nitric acid is about 68%, while the concentration of industrial grade concentrated nitric acid is 98%, and the concentration of fuming nitric acid is usually about 98%. Due to the harmfulness of nitric acid, no matter the concentrated dilute solution is oxidizing And corrosive, so it is very dangerous to people, it can cause serious burns only on the skin, and it must have a negligible impact on the environment. It must be scientifically stored during storage. Once a leakage accident occurs, the hidden safety hazard is very serious.

The editor of the nitric acid tank material recommended the following: Dilute nitric acid below 40% can be steel-lined plastic. When dilute nitric acid contacts the surface of the PE layer, the surface of the PE layer will become black and carbonized, but this is normal. After melting and adhering to carbon steel, and the thickness reaches more than 16mm, after the surface of the PE layer is carbonized and blackened, it prevents 40% or less of the dilute nitric acid from further corrosion and oxidation. It is feasible, and it is cheaper and more cost-effective than stainless steel. Above 40% and below 68% concentrated nitric acid can be stored in stainless steel 304L, 316L. Fuming nitric acid must be stored in aluminum cans. 304L, 316L and other materials are not resistant to fuming nitric acid. When stored in aluminum cans, aluminum An oxide film is formed on the surface, which plays a role of passivation, thereby protecting the aluminum can from the corrosion and oxidation of fuming nitric acid.

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Zibo Fubang Rotomolding Technology Co., Ltd. specializes in the production of various types of storage tanks , hydrochloric acid tanks , sulfuric acid tanks , nitric acid tanks , chemical storage tanks , plastic storage tanks , PE storage tanks , polyethylene storage tanks , and steel-lined plastic tanks . Tank

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