Metal corrosion inhibitor

A metal corrosion inhibitor and technology of corrosion inhibitor, applied in the field of metal corrosion prevention, can solve problems such as poor corrosion inhibition rate, and achieve the effects of increasing the protection area, good corrosion inhibition rate and tight arrangement

Inactive Publication Date: 2003-06-11
CHINA PETROCHEMICAL CORP +1
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AI-Extracted Technical Summary

Problems solved by technology

As mentioned above, because the PH value in foreign countries is controlled under weakly acidic conditions, there is no need to consider the problem of the corrosion inhibition rate of corrosion inhibitors under alkaline condit...
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Abstract

The invention provides a kind of metal anti-corrosion agent, which is made up of 20%-50% imidazole quinolin acrylamine which has fragrant ring, 20%-50% straight chain imidazole quinolin acylamine, 0-5% alkynol and its ramification, 0-60% solvent, the anti-corrosion agent has excellent anti-corrosion rate in strong acid (pH value<3.0) and alkalescence (pH value is 7.0-8.5%).

Technology Topic

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  • Metal corrosion inhibitor

Examples

  • Experimental program(4)

Example Embodiment

[0032] Example 1
[0033] The corrosion inhibitor A of the present invention consists of: imidazoline amide with aromatic ring: 50%; linear imidazoline amide: 20%; thiourea: 2.5%; propynol: 2.5%; xylene: 25%.
[0034] Experimental conditions: 1000ppmHCl+1000ppmNaCl+160ppmH 2 S, static soaking for 6h 90℃
[0035] It can be seen from Table 1: Corrosion inhibitor A has a high corrosion inhibition rate in the range of PH value of 1.86 to 7.5, which can meet the needs of corrosion protection for the condensing and cooling system equipment at the top of the atmospheric and vacuum plant.

Example Embodiment

[0036] Example 2
[0037] The corrosion inhibitor B of the present invention is composed of: imidazoline amide with aromatic ring: 20%; linear imidazoline amide: 50%; thiamine: 2.5%; propynol: 2.5%; gasoline: 25%.
[0038] Experimental conditions: 1000ppmHCl+1000ppmNaCl+160ppmH 2 S, static soaking for 6h 90℃
[0039]It can be seen from Table 2: Corrosion inhibitor B has a high corrosion inhibition rate in the range of PH value of 1.86 to 7.5, which can meet the needs of corrosion protection for the equipment of the condensing cooling system at the top of the atmospheric and vacuum plant.

Example Embodiment

[0040] Example 3
[0041] The corrosion inhibitor C of the present invention consists of: imidazoline amide with aromatic ring: 30%; linear imidazoline amide: 30%; thiourea: 2.5%; propynol: 2.5%; diesel: 35%.
[0042] Experimental conditions: 1000ppmHCl+1000ppmNaCl+160ppmH 2 S, static soaking for 6h 90℃
[0043] It can be seen from Table 3 that the corrosion inhibitor C has a high corrosion inhibition rate in the range of PH value of 1.86 to 7.5, which can meet the needs of corrosion protection for the equipment of the condensing cooling system at the top of the atmospheric and vacuum plant.
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Description & Claims & Application Information

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