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Trielement synergistic corrosion inhibitor

A technology of corrosion inhibitor and water treatment agent, used in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc., can solve problems such as a large number of fresh water replacement, and reduce blindness and experience. , Good corrosion and scale inhibition performance and small dosage of chemicals

Inactive Publication Date: 2006-11-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite water treatment agent needs to be based on the pre-membrane to achieve good results, and the pre-membrane process requires a large amount of fresh water replacement and wastewater discharge

Method used

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  • Trielement synergistic corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the formula of the present invention, the water treatment agent is prepared by conventional methods. According to the HG / T2159-91 standard, fix the standard A3 steel test piece on the test piece frame of the dynamic corrosion tester, and directly put it into the test piece with PASP30mg / L, zinc chloride 3mg / L (Zn 2+ meter), PBCTA20mg / L and standard corrosion water (containing calcium chloride dihydrate 735mg / L, magnesium sulfate 493mg / L, sodium chloride 658mg / L and sodium bicarbonate 168mg / L) in a test cup, the test cup is placed In a constant temperature water bath at 40°C, the test piece rotates at a speed of 0.35m.S-1, the test solution evaporates naturally, and water is replenished every 4h, and the test is stopped after 72h. The measured corrosion rate of the standard A3 steel test piece is 0.050mm / a .

Embodiment 2

[0022] The operating method is the same as in Example 1, and the sodium polyaspartate is substituted for PASP (consumption is calculated in PASP), and the remaining conditions are the same as in Example 1. The measured corrosion rate of the standard A3 steel test piece is 0.052mm / a.

Embodiment 3

[0024] The operating method is the same as in Example 1, and the calcium polyaspartate is substituted for PASP (consumption is calculated in PASP), and the remaining conditions are the same as in Example 1. The measured corrosion rate of the standard A3 steel test piece is 0.056mm / a.

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Abstract

A three elements cooperating corrosion inhibitor PASP-Zn-PBTCA used as composite water treating agent for treating the circulated cooling water and sewage is composed of polyaspartate substances, Zn salt and 2-phosphobutane-1,2,4-tricarboxylic acid.

Description

technical field [0001] The invention relates to a synergistic corrosion inhibitor, in particular to a ternary synergistic corrosion inhibitor containing polyaspartic acid for cooling water treatment and waste water treatment. Background technique [0002] The synergistic effect of corrosion inhibitors means that when the amount of corrosion inhibitors is the same, with the appropriate mixture of corrosion inhibitors, the corrosion inhibition effect is obviously higher than that of each component used alone. As early as the early 1950s, the synergistic effect of corrosion inhibitors had been discovered and became the main basis for the research of corrosion inhibitors and the development of modern commercial corrosion inhibitors. However, until now, the nature and regularity of the synergistic effect of corrosion inhibition are far from being ascertained, and the development of composite corrosion inhibitors is basically empirical. Take the newly developed corrosion inhibito...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12C02F5/14
Inventor 魏刚杨西东熊蓉春
Owner BEIJING UNIV OF CHEM TECH
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