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How to Prevent Corrosion of Cryogenic Liquid Tank?

Sep. 24, 2019

A pressure vessel is a closed device that holds a gas or liquid and carries a certain pressure. Pressure vessels are used in a wide range of applications and have important positions and functions in many sectors, such as industrial and civil. However, a common problem with pressure vessels in use is corrosion.

Corrosion, cracking, damage, erosion, and physical damage are all obvious failure modes of Cryogenic Liquid Tank. Therefore, be careful when using pressure vessels. Cryogenic Tank Supplier believes that there are two reasons for the corrosion of pressure vessels.

Material characteristics: The material characteristics of the pressure vessel affect and determine the level of corrosion resistance of the pressure vessel. The corrosion rate will be disturbed by the structural density and oxidizing property of the surface metal crystal. The larger the crystal structure density, the rougher the surface, the larger the crystal pores, the easier the service material will penetrate, and the more likely the corrosion reaction will occur.

External environment: The internal and external environment of Cryogenic Liquid Tank will directly affect its anti-corrosion performance. Pressure vessels carry a large number of reagents, and the cost of the materials contained therein is high. It is inevitable that a small number of corrosive materials, such as acidic materials and alkaline materials, may be mixed, and these components are likely to cause corrosion of the pressure vessel.

Cryogenic Liquid Tank

Cryogenic Liquid Tank

There are several measures to deal with the corrosion of Cryogenic Liquid Storage Tank:

1. Improve the external environment

As far as possible, it is possible to prevent the container from being used in a working environment such as high temperature and humidity; on the other hand, it is possible to adopt an electroplating method and a corrosive agent added to the medium to optimize the use environment of the material itself.

2. Add and choose the appropriate corrosion inhibitor

The metal surface of the container plus an appropriate amount of corrosion inhibitor can effectively improve the corrosion level and reduce the corrosion rate. The cost of adding corrosion inhibitors is lower than that of other anti-corrosion processes, and the effect is obvious. Especially for controlling chemical corrosion and electrochemical reaction corrosion, it has achieved targeted results.