Metal corrosion inhibitor composition, metal corrosion inhibitor thereof and application thereof

A technology of metal corrosion inhibitor and composition, applied in the field of metal corrosion inhibitor composition, can solve the problems of poor water solubility of copper corrosion inhibitor, increase water treatment cost, poor water solubility, etc. Low cost, anti-corrosion effect

Active Publication Date: 2012-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the copper corrosion inhibitors currently used are more or less toxic, such as the above-mentioned commonly used derivatives of BTA, imidazole, thiazole, carbazole, aniline, thiourea and triphenylmethane, etc., due to these corrosion inhibitors The toxicity of copper has brought a lot of inconvenience to the application process; at the same time, the copper corrosion inhibitors currently used are poor in water solubility, and it is difficult to compound with other scale and corrosion inhibitors, and most of the water cooling equipment in the circulating water system It is carbon steel, and part of the equipment is made

Method used

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  • Metal corrosion inhibitor composition, metal corrosion inhibitor thereof and application thereof
  • Metal corrosion inhibitor composition, metal corrosion inhibitor thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0056] Examples 1-5 are to illustrate the preparation method of the metal corrosion inhibitor of the present invention.

[0057] The metal corrosion inhibitor composition of the present invention is obtained by mixing according to the first method of the present invention, wherein the various raw materials of the metal corrosion inhibitor composition of Examples 1-5 and the type of acidic aqueous solution and the metal corrosion inhibitor composition and The mixing conditions of the acidic aqueous solution are shown in Table 2. Sodium polyepoxysuccinate was purchased from Beijing Linhua Water Quality Stabilizer Factory, and the brand name is RP-112 (PESA polyepoxysuccinic acid).

[0058] Table 2

[0059]

experiment Embodiment 1-5

[0061] The metal corrosion inhibitors obtained in Examples 1-5 of the present invention were subjected to a laboratory corrosion inhibition performance test (according to GB / T 18175-2000 "Determination of Corrosion Inhibition Performance of Water Treatment Agents Rotating Coupon Method", with blank samples and containing The benzotriazole (BTA) compound agent (trade name: JH-D-01) was used as a control test. The mass concentration of the metal corrosion inhibitor in the test water was 100±10mg / L. The test water was simulated water with circulating water on site. See Table 3 for water quality data, and Table 4 for specific test results.

[0062] table 3

[0063] Item

[0064] Table 4

[0065] Item

[0066] It can be seen from the test results in Table 4 that under the condition of simulated water quality of circulating water on site, the corrosion inhibition effect of the metal corrosion inhibitor of the present invention is better than that of the copper-containing corrosion i...

experiment Embodiment 6-10

[0068] The metal corrosion inhibitors obtained in Examples 1-5 of the present invention are subjected to laboratory dynamic simulation tests (according to the chemical industry standard HG / T 2160-1991 "Cooling Water Dynamic Simulation Test Method" and HG / T20690-2000 "Chemical Enterprise Circulation" "Cooling Water Treatment Design Technical Regulations", using a compound containing benzotriazole (BTA) (trade name: JH-D-01) as a control test, and using a mixture of on-site softened water and industrial fresh water as a supplement to the dynamic simulation test Water, at the beginning of the test, add a certain quality of sodium bicarbonate to the system to adjust the alkalinity of the circulating water, calculated as calcium carbonate, it is 100mg / L, and the mass concentration of the metal corrosion inhibitor in the water is 100±10mg / L. During concentration, the alkalinity of the circulating water is no longer controlled, and the test tube is not pre-filmed, and it runs continuou...

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Abstract

The invention provides a metal corrosion inhibitor composition, a metal corrosion inhibitor thereof and an application thereof. The metal corrosion inhibitor composition contains a water-soluble inorganic zinc salt, an organic phosphine compound, an inorganic phosphorus compound, polyepoxysuccinic acid, a polyacrylamide polymer, and a gluconate, wherein the weight ratio is 0.5-5:0.1-5:0.1-2.5:0.5-8:3-20:1. The metal corrosion inhibitor of the invention has the advantages of good water solubility, and easy complex use with other water processing agents, can satisfy anticorrosion requirements of various metal devices (such as copper devices), and also can satisfy requirements of carbon steel devices of a system, so the metal corrosion inhibitor has very high industrial application values.

Description

Technical field [0001] The invention relates to a metal corrosion inhibitor composition and a metal corrosion inhibitor using the metal corrosion inhibitor composition of the invention and its application as a copper corrosion inhibitor. Background technique [0002] Cooling water is an indispensable public project for industrial enterprises and a large water user. Recycling the cooling water after treatment, on the one hand, can meet the requirements of the process for the water treatment effect and ensure the normal operation of the production device in a long period; on the other hand, it can save more than 98% of industrial water, reduce a larger amount of sewage, and protect water. Resources, protecting the water environment, and reducing production costs have huge benefits. [0003] Copper has excellent strength, mechanical processing properties, thermal conductivity, electrical conductivity, weldability and corrosion resistance, and is widely used in thermal cycling systems...

Claims

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Application Information

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IPC IPC(8): C23F11/08
CPCC23F11/08
Inventor 王金华李本高余正齐傅晓萍李亚红
Owner CHINA PETROLEUM & CHEM CORP
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