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Novel use of organic phosphonite

An organic phosphine, a new-purpose technology, applied in the field of anti-corrosion of metal materials/chemical equipment, to achieve the effect of broadening the scope of use, good corrosion inhibition effect, and high application value

Inactive Publication Date: 2011-04-27
JIAYING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of organic phosphine as a corrosion inhibitor is mostly found in the research on ferrous metals, copper and its alloys, and there is no report on its use in titanium corrosion inhibition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The experimental medium is 10%H 2 SO 4 , the experimental temperature is (50±1)℃. The corrosion rate and corrosion inhibition efficiency of titanium sheets without corrosion inhibitor and with corrosion inhibitor were tested according to the above method. The test results are as follows:

[0018] Corrosion inhibitor and its concentration

Embodiment 2

[0020] The experimental medium is different concentrations of H 2 SO 4 solution, the experimental temperature is (50±1)°C, and the corrosion inhibitor is ATMP. The corrosion rate and corrosion inhibition efficiency of the titanium sheet were tested respectively according to the above method. The test results are as follows:

[0021] h 2 SO 4 concentration

Embodiment 3

[0023] The experimental medium is 10%H 2 SO 4 , the corrosion inhibitor is DTPMPA. According to the above method, the corrosion rate and corrosion inhibition efficiency of titanium sheets were tested at different temperatures. The test results are as follows:

[0024] temperature

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PUM

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Abstract

The invention discloses novel use of organic phosphonite, in particular use of the organic phosphonite as a corrosion inhibitor of titanium in sulfuric acid solution. The organic phosphonite may be one of amino trimethylene phosphonic acid and salts thereof, 1-hydroxy ethylidene-1,1-diphosphonic acid and salts thereof, [1,2-ethanediylbis(nitrilobis-(methylene))]tetrakis-phosphonic acid and salts thereof, diethylenetriaminepenta(methylene-phosphonic acid) and salts thereof, polyhydric alcohol phosphate ester, 2-hydroxyphosphonoacetic acid, hexamethylene diamine tetra(methylene phosphonic acid) and salts thereof, polyamino polyether methylene phosphonates, bis(hexamethylene triamine penta (methylene phosphonic Aacid)) and salts thereof, and phytic acid. The invention belongs to the technical field of metal material / chemical equipment anticorrosion. The corrosion inhibitor has a good corrosion inhibition effect on sulfuric acid under the condition of low dosage and has a high application value.

Description

technical field [0001] The invention provides a new application of organic phosphine, especially the application of organic phosphine as a corrosion inhibitor of titanium in sulfuric acid solution, which belongs to the technical field of metal material / chemical equipment anticorrosion. Background technique [0002] Titanium has the advantages of good plasticity, high temperature resistance, mechanical strength and hardness similar to steel, and strong corrosion resistance in neutral and oxidizing environments. Therefore, it has a wide range of uses in industry, and is called "the third metal". It is used in chemical industry, metallurgy, vacuum salt making, electric power and other fields. Although titanium is a metal with high corrosion resistance, it is susceptible to strong corrosion in non-oxidizing media. According to research, the corrosion rate of titanium in sulfuric acid solution increases with the increase of acid concentration, and the corrosion rate reaches the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/04C23F11/167
Inventor 赖俐超唐春保张丰如郭远凯
Owner JIAYING UNIV
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