Aluminum alloy corrosion inhibitor

A technology of aluminum alloy corrosion inhibitor and calcium gluconate, which is applied in the field of aluminum alloy corrosion inhibitor, can solve the problems of limited surface area of ​​catalyst carrier microspheres, inactivation of GOD and CAT, and inability to load enzyme proteins, which is conducive to sustainable development. Development, low production costs, and improved immobilization efficiency

Inactive Publication Date: 2013-06-26
滁州旭中化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention has designed a kind of aluminum alloy corrosion inhibitor, and the technical problem that it solves is: (1) existing salt medium corrosion inhibitor has problems such as low corrosion inhibition rate, large dosage, toxicity and high price; (2) ) The surface area of ​​the catalyst carrier microspheres used to prepare calcium gluconate is limited, and it is impossible to load too much enzyme protein, so that the recovery rate of enzyme activity is low; (3) due to the influence of mass transfer resistance, the H generated in the reaction process 2 o 2 It cannot be decomposed quickly, resulting in the inactivation of GOD and CAT, and the immobilized enzyme loses most of its enzyme activity soon after continuous use

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: A kind of aluminum alloy corrosion inhibitor, is prepared from following raw material by weight ratio: 1 part of potassium nitrite, 60 parts of calcium gluconate, 5 parts of mercaptobenzothiazole, 2 parts of borate and 4 parts cetylamine.

[0025] Wherein, the preparation technology of calcium gluconate is as follows:

[0026] With 2% (v / v) ethylenediamine solution as the amination reagent, the average pore size of the carrier is 100-200nm, and the carrier is dispersed in the 2% (v / v) amination reagent according to the mass of the carrier: the volume of the amination reagent is 1:40 , at pH 8.0, 200 rpm shaking reaction at 60° C. for 2 h, and the aminated carrier was collected.

[0027] GOD and CAT were dissolved in 0.1 mol / l phosphate buffer at pH 6 according to the activity ratio of GOD:CAT being 1:2. Add 0.2% (w / v) carbodiimide and 0.2% (w / v) N-hydroxysuccinimide to the enzyme solution, react at 8°C for 60 min, and disperse the aminated carrier in the...

Embodiment 2

[0030] Embodiment 2: A kind of aluminum alloy corrosion inhibitor, is prepared from following raw material by weight ratio: 2 parts of potassium nitrite, 100 parts of calcium gluconate, 2 parts of mercaptobenzothiazole, 5 parts of borate and 5 parts cetylamine.

[0031] Wherein, the preparation technology of calcium gluconate is as follows:

[0032] With 2% (v / v) ethylenediamine solution as the amination reagent, the average pore size of the carrier is 400-500nm, and the carrier is dispersed in the 2% (v / v) amination reagent according to the mass of the carrier: the volume of the amination reagent is 1:40 , at pH 8.0, 200 rpm shaking reaction at 60° C. for 2 h, and the aminated carrier was collected.

[0033] GOD and CAT were dissolved in 0.1 mol / l phosphate buffer at pH 6 according to the activity ratio of GOD:CAT being 1:2. Add 0.2% (w / v) carbodiimide and 0.2% (w / v) N-hydroxysuccinimide to the enzyme solution, react at 8°C for 60 min, and disperse the aminated carrier in t...

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Abstract

The invention discloses an aluminum alloy corrosion inhibitor which is prepared from the following raw materials in parts by weight: 1-2 parts of potassium nitrite, 20-100 parts of calcium gluconate, 2-5 parts of mercapto benzothiazole, 2-5 parts of borate, and 2-5 parts of hexadecane amine. A new technology is provided for reparation of required calcium gluconate from a water quality stabilizer; the new technology ensures that the aluminum alloy corrosion inhibitor is high in calcium gluconate yield, mild in reaction condition and simple and easily available in equipment, and is an environment-friendly production technology.

Description

technical field [0001] The invention relates to an aluminum alloy corrosion inhibitor, in particular to a salt water medium aluminum alloy corrosion inhibitor. Background technique [0002] Due to the nature of the aluminum material itself, the corrosion characteristics of the aluminum alloy material in the salt water medium are different from those of acid, alkali solution and neutral aqueous solution. Aluminum is an active amphoteric metal, which forms uniform corrosion in acid and alkali solutions. In a neutral aqueous solution, due to the passive nature of the aluminum alloy surface, its corrosion is localized, and pitting corrosion is a typical form of localized corrosion. Crevice corrosion of aluminum alloy is particularly obvious in salt water medium. Crevice corrosion is localized corrosion inside aluminum alloy, and its corrosion degree is more serious than pitting corrosion and uniform corrosion. Therefore, the development of corrosion inhibitors in salt water med...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/16
Inventor 王慧殷丽
Owner 滁州旭中化工有限公司
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