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Metal corrosion preventing method in water environment

A metal anti-corrosion and water environment technology, applied in the field of metal anti-corrosion, can solve the problems of metal corrosion and the inability of anti-corrosion methods to achieve cost and utility, and achieve the effect of preventing corrosion, facilitating promotion and application, and achieving good effects.

Inactive Publication Date: 2006-01-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the fact that metals corrode more seriously in the presence of oxygen, and the current anti-corrosion methods cannot achieve the optimization of cost and effectiveness, it is necessary to develop a more economical and effective method for preventing metal corrosion

Method used

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  • Metal corrosion preventing method in water environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 3 parts of 100 mg of activated carbon fiber, spread out and place them flat in beakers filled with 200 ml of tap water with a pH of 4, 7 and 10 respectively.

[0019] After derusting and polishing 6 groups of iron sheets (5 pieces in each group), they were weighed in groups, and 3 groups were scattered in the above-mentioned 3 kinds of water samples, and the other 3 groups were placed in the pH without adding activated carbon fiber. 4, 7 and 10 in 200ml of tap water.

[0020] After soaking for one week, the iron sheets of each group were taken out, derusted and weighed. The results are shown in Table 1.

[0021] The results showed that under neutral conditions, the static corrosion rate of iron sheets was effectively reduced in a wide range of pH 4-10 after the addition of activated carbon fibers.

[0022] pH

4

7

10

Corrosion rate of iron sheet

(%)

Add activated carbon fiber

0.121

0.119

0.093

...

Embodiment 2

[0026] Embodiment 2 (dynamic corrosion of iron sheet)

[0027] (Blank test) Take a group of iron sheets (88-89g), weigh them after derusting and polishing, and perform dynamic corrosion. After 1 week, the iron sheet was taken out, and the surface was derusted before weighing.

[0028] Put 100 mg of activated carbon fiber into the filter tube of the dynamic corrosion test device as the filter material, follow the steps of the above blank test, and compare the results with those of the blank test, as shown in Table 3.

[0029] blank

activated carbon fiber

Corrosion reduction

(%)

Corrosion rate of iron sheet (%)

0.141

0.050

64.54

[0030] It can be seen from Table 3 that compared with the results of the blank test, it is found that the activated carbon fiber can effectively reduce the amount of corrosion by about 64%.

[0031] Combined with the static test results under the same additive conditions, it can be found t...

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Abstract

An anticorrosion method for metal in water environment features that the activated carbon fibres which have high adsorpativity and redox nature are uniformly added to the water around the metal to lower the potential of water and decrease the O2 dissolved in water. It is suitable for boiler, centralized air conditioner, etc.

Description

technical field [0001] The invention relates to a metal anti-corrosion method in a water environment, which is a metal anti-corrosion method that reduces the potential of the solution and regulates dissolved oxygen by adding activated carbon fibers to the water environment around the metal, and is suitable for industrial water circulation systems such as boilers and central air conditioners. metal anti-corrosion. Background technique [0002] Metal corrosion, according to its reaction characteristics, can generally be divided into chemical corrosion, biochemical corrosion and electrochemical corrosion. Chemical corrosion is caused by the direct contact of oxidants with the metal surface and a chemical reaction occurs. The biochemical corrosion of metals is caused by the life activities of various microorganisms. For example, some microorganisms use metals as culture medium, or erode metals with their excrement. The electrochemical corrosion of metal is caused by the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/08
Inventor 杨骥彭娟张峰贾金平王亚林
Owner SHANGHAI JIAO TONG UNIV
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