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Transition metal compound efficient metal acid pickling corrosion inhibitor and application thereof

A technology of transition metals and complexes, applied in the field of metal pickling corrosion and protection, corrosion and protection, can solve the problems of irritating odor of organic corrosion inhibitors, toxic and side effects of inorganic corrosion inhibitors, unstable corrosion inhibition performance, etc., to achieve Excellent corrosion inhibition performance, inhibition of excessive corrosion, and long-lasting effect

Inactive Publication Date: 2019-07-30
四川文理学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types and large quantities of corrosion inhibitors, different types of corrosion inhibitors still have some shortcomings, such as toxic and side effects of inorganic corrosion inhibitors, poor environmental friendliness, irritating odor and unstable corrosion inhibition performance of organic corrosion inhibitors , more synthesis steps and higher preparation costs

Method used

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  • Transition metal compound efficient metal acid pickling corrosion inhibitor and application thereof
  • Transition metal compound efficient metal acid pickling corrosion inhibitor and application thereof
  • Transition metal compound efficient metal acid pickling corrosion inhibitor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, sulfuric acid and hydrochloric acid are used as inorganic acids, the concentrations of which are respectively 1.00 mol / L, and the dosage of inorganic acids is 5.0 L. Add nickel diphenylmethyl dithiophosphate into the inorganic acid solution to obtain a pickling solution with a corrosion inhibitor concentration of 0.5-400 mg / L. Under the condition of 25°C, the Q235 steel to be cleaned was immersed in the pickling solution for 48 hours, and the test results are listed in Table 1.

[0035] Table 1:

[0036]

[0037] Based on the test results, listed in Table 1, the test results show that the nickel diphenylmethyl dithiophosphate corrosion inhibition rate is high, and this corrosion inhibitor is a high-efficiency pickling corrosion inhibitor that is less affected by the corrosion inhibitor concentration. .

Embodiment 2

[0039] In this embodiment, sulfuric acid and hydrochloric acid are used as the inorganic acid, the concentration is 1.00 mol / L, and the dosage of the inorganic acid is 5.0 L. Add nickel diphenylmethyl dithiophosphate to the inorganic acid solution to obtain a pickling solution with a corrosion inhibitor concentration of 100 mg / L. Under different temperature conditions, the Q235 steel to be cleaned was immersed in the pickling solution for 48 hours, and the test results are listed in Table 2.

[0040] Table 2:

[0041]

[0042] Based on the test results, which are listed in Table 2, the test results show that the nickel diphenylmethyl dithiophosphate has a high corrosion inhibition rate, and the corrosion inhibitor is a high-efficiency pickling corrosion inhibitor that is less affected by the pickling temperature.

Embodiment 3

[0044] In this embodiment, sulfuric acid and hydrochloric acid are used as the inorganic acid, the concentration is 0.01-5.00 mol / L, and the dosage of the inorganic acid is 5.0 L. Add nickel diphenylmethyl dithiophosphate to the inorganic acid solution to obtain a pickling solution with a corrosion inhibitor concentration of 100 mg / L. Under the condition of 25°C, the Q235 steel to be cleaned was immersed in the pickling solution for 48 hours, and the test results are listed in Table 3.

[0045] table 3:

[0046]

[0047]

[0048] Based on the test results, which are listed in Table 3, the test results show that the nickel diphenylmethyl dithiophosphate has a high corrosion inhibition rate, and the corrosion inhibitor is a high-efficiency pickling corrosion inhibitor that is less affected by the acid concentration.

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Abstract

The invention provides a transition metal compound efficient metal acid pickling corrosion inhibitor and application thereof, and belongs to the field of metal acid pickling corrosion and protection.The corrosion inhibitor is a transition metal compound, has the advantages of being environment-friendly, without toxicity, simple in synthesis, low in cost, efficient and stable in corrosion resistance. The corrosion inhibitor can be used for acid pickling corrosion of metals, is wide in application range and has good corrosion inhibition performance. Meanwhile, the corrosion inhibitor can betterbear the change of cleaning conditions, and particularly has the advantage of being stable in corrosion inhibition performance. In addition, the corrosion inhibitor also has the advantages of being environment-friendly, without toxicity, simple in synthesis and low in cost, has relatively high application value, and is worthy of large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of corrosion and protection, in particular to the field of metal pickling corrosion and protection, in particular to a metal pickling corrosion inhibitor with high efficiency and stable corrosion inhibition performance and application thereof. The invention adopts diphenylmethyl dithiophosphoric acid transition metal complex as a new metal corrosion inhibitor, has the characteristics of high efficiency, stable corrosion inhibition performance and simple synthesis, and has wide application range and good application prospect. Background technique [0002] Metal materials are the most widely used engineering materials in modern society, and they play an extremely important role in various fields of national economy. However, the corrosion of metal materials and their equipment will not only bring huge economic losses to human society, but also may cause catastrophic accidents, and may cause waste of resources and energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
CPCC23G1/066
Inventor 赖川邓远方康燕曹静王庆远
Owner 四川文理学院
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