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A kind of aluminum pickling corrosion inhibitor and its preparation method and application

A technology of corrosion inhibitor and aluminum acid, which is applied in the field of aluminum alloy anticorrosion, can solve the problems of low corrosion inhibition rate, high price, large dose, etc., and achieve the effect of enhancing corrosion inhibition performance, reducing dosage, and insensitivity to pH value changes

Active Publication Date: 2017-01-25
马鞍山市鸿伟环化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low corrosion inhibition rate, large dosage, toxicity and high price in the existing acidic medium corrosion inhibitors, the present invention provides an aluminum pickling corrosion inhibitor and its preparation method and application. Based on the research of aluminum corrosion inhibitors, the compound effect of additives and corrosion inhibitors is studied, and the synergistic effect between corrosion inhibitors and corrosion inhibitors, and between corrosion inhibitors and additives is searched, so as to produce highly efficient and environmentally friendly Aluminum pickling corrosion inhibitor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of aluminum pickling corrosion inhibitor, the steps are:

[0029] (a) Weigh 15 parts of polydienyl propylene dimethyl ammonium chloride, 10 parts of zinc sulfate, 5 parts of hexamethylenetetramine and 20 parts of water in parts by mass, heat to 35 ° C, stir and mix at a speed of 180 rpm Uniformly, the first solution of aluminum pickling corrosion inhibitor is obtained;

[0030] (b) Take by weight 20 parts of sodium molybdate, 5 parts of zinc sulfate, 5 parts of hexamethylenetetramine and 15 parts of water and stir and mix evenly at a speed of 180 rpm at room temperature to obtain the content of the aluminum pickling corrosion inhibitor Liquid B;

[0031] (c) Weigh 20 parts of thiourea and 15 parts of water in parts by mass, stir and mix evenly at a speed of 180 rpm at 15°C to obtain liquid C of aluminum pickling corrosion inhibitor;

[0032] (d) Cool the liquid A obtained in step (a) to 15°C, then add liquid C obtained in step (c) and liquid B obt...

Embodiment 2

[0043] A preparation method of aluminum pickling corrosion inhibitor, the steps are:

[0044](a) Weigh 5 parts of polydienylpropylenedimethylammonium chloride, 5 parts of zinc sulfate, 10 parts of hexamethylenetetramine and 15 parts of water in parts by mass, heat to 30°C, stir and mix at a speed of 220rpm Uniformly, the first solution of aluminum pickling corrosion inhibitor is obtained;

[0045] (b) Take by weight 30 parts of sodium molybdate, 5 parts of zinc sulfate, 5 parts of hexamethylenetetramine and 10 parts of water and stir and mix evenly at a speed of 220 rpm at room temperature to obtain the content of aluminum pickling corrosion inhibitor Liquid B;

[0046] (c) Weigh 10 parts of thiourea and 15 parts of water in parts by mass, stir and mix evenly at 220 rpm at 10°C to obtain liquid C of aluminum pickling corrosion inhibitor;

[0047] (d) Cool the liquid A obtained in step (a) to 10°C, then add the liquid C obtained in step (c) and the liquid B obtained in step (...

Embodiment 3

[0050] A preparation method of aluminum pickling corrosion inhibitor, the steps are:

[0051] (a) Weigh 10 parts of polydienyl propylene dimethyl ammonium chloride, 10 parts of zinc sulfate, 7 parts of hexamethylenetetramine and 18 parts of water in parts by mass, heat to 45 °C, stir and mix at a speed of 250 rpm Uniformly, the first solution of aluminum pickling corrosion inhibitor is obtained;

[0052] (b) Take by weight 25 parts of sodium molybdate, 10 parts of zinc sulfate, 6 parts of hexamethylenetetramine and 12 parts of water, stir and mix at room temperature at a speed of 250rpm to obtain the aluminum pickling corrosion inhibitor Liquid B;

[0053] (c) Weigh 25 parts of thiourea and 15 parts of water in parts by mass, stir and mix evenly at a speed of 250 rpm at 20°C to obtain liquid C of aluminum pickling corrosion inhibitor;

[0054] (d) Cool the liquid A obtained in step (a) to 20°C, then add the liquid C obtained in step (c) and the liquid B obtained in step (b) ...

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Abstract

The invention discloses an aluminum acid pickling corrosion inhibitor and a preparation method and an application thereof, belongs to the field of aluminum alloy anticorrosion. The corrosion inhibitor consists of water, sodium molybdate, zinc sulfate, hexamethylenetetramine, thiocarbamide and poly-diallyldimethylammonium chloride. The preparation method comprises the following steps: (1) uniformly mixing the poly-diallyldimethylammonium chloride, a portion of zinc sulfate, a portion of hexamethylenetetramine and water to obtain a solution A; (2) uniformly mixing the sodium molybdate, a portion of zinc sulfate, a portion of hexamethylenetetramine and water to obtain a solution B; (3) uniformly mixing the thiocarbamide and cold water to obtain a solution C; (4) adding the solution C and the solution B into the solution A, and uniformly stirring to obtain the corrosion inhibitor. The corrosion inhibitor disclosed by the invention is good in effect and environment-friendly, is suitable for corrosion inhibition protection in the acid pickling process of aluminum alloy materials, and has the advantages of simple preparation technology, mild condition and good easiness in manufacturing.

Description

technical field [0001] The invention belongs to the field of aluminum alloy anticorrosion, and more specifically relates to an aluminum pickling corrosion inhibitor and its preparation method and application. Background technique [0002] Aluminum has the characteristics of light material, good thermal conductivity, easy processing, and very corrosion-resistant in neutral, near-neutral water and atmosphere, and is widely used in the manufacture of aluminum plate cooling equipment, condensers, air coolers, crystallizers, and reactors , dryers, storage tanks, tank cars and piping, etc., are also widely used in construction, transportation, light industry and civil industries. A layer of oxide film can be formed on the surface of aluminum under natural conditions, but this film is very thin and easily damaged, so its corrosion resistance is very poor, resulting in an astonishing corrosion loss caused by various environments every year. In order to improve the corrosion resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/04
Inventor 孙立明唐胜卫孙若思李平唐棣贾虹
Owner 马鞍山市鸿伟环化有限公司
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