Unlock instant, AI-driven research and patent intelligence for your innovation.

Water-based acid pickling corrosion inhibition passivator for stainless steel

A technology of stainless steel and passivation agent, applied in the direction of metal material coating process, etc., can solve the problems of environmental damage, unfavorable health of workers, etc., and achieve good passivation effect.

Inactive Publication Date: 2017-11-07
SUZHOU JILI STAINLESS STEEL PROD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The pickling passivation solution in the prior art has a strong pungent smell, which is not conducive to the health of workers and has a destructive effect on the environment. Therefore, it is urgent to provide an environmentally friendly, non-toxic stainless steel pickling passivation solution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water-based acid pickling corrosion inhibition passivator for stainless steel
  • Water-based acid pickling corrosion inhibition passivator for stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 3 parts of phenylalanine, 5 parts of acetic acid, 2 parts of lactic acid, 2 parts of dipotassium hydrogen phosphate, 1 part of potassium dihydrogen phosphate, 2 parts of phosphoric acid, 0.3 parts of thiourea, 1.5 parts of aniline, 2 parts of ethanol, 2 parts of DTMPPA, 0.5 parts of calcium chromate, 2 parts of potassium nitrate, 0.5 parts of EDTA, 8 parts of water.

Embodiment 2

[0024] 2 parts of phenylalanine, 1 part of acetic acid, 1 part of lactic acid, 1 part of dipotassium hydrogen phosphate, 0.5 part of potassium dihydrogen phosphate, 1 part of phosphoric acid, 0.1 part of thiourea, 1 part of aniline, 1 part of ethanol, 1 part of DTMPPA, 0.2 part of calcium chromate, 1 part of potassium nitrate, 0.1 part of EDTA, 3 parts of water.

Embodiment 3

[0025] Embodiment 3: the influence of phenylalanine, acetic acid, lactic acid on the performance of passivation film.

[0026] Adjust the ratio of phenylalanine, acetic acid, and lactic acid in the corrosion inhibitor, and the ratio of the remaining components is as follows: 1 part of dipotassium hydrogen phosphate, 0.5 part of potassium dihydrogen phosphate, 1 part of phosphoric acid, 0.1 part of thiourea, and 1 part of aniline , 1 part of ethanol, 1 part of DTMPPA, 0.2 part of calcium chromate, 1 part of potassium nitrate, 0.1 part of EDTA, 3 parts of water.

[0027] The adjustment ratio is shown in Table 1, and the test results are shown in Table 2.

[0028] Table 1 Mass ratio of phenylalanine, acetic acid and lactic acid

[0029] Numbering

Phenylalanine

Acetic acid

lactic acid

1

0

0

0

2

2

0

0

3

0

1

0

4

0

0

1

5

2

1

1

[0030] The influence of table 2 phenylalanine, acetic ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a water-based pickling corrosion inhibitor and passivator for stainless steel, which comprises the following substances in parts by weight: 2-3 parts of phenylalanine, 1-5 parts of acetic acid, 1-2 parts of lactic acid, 1-2 parts of dipotassium hydrogen phosphate, Potassium dihydrogen phosphate 0.5~1 part, phosphoric acid 1~2 part, thiourea 0.1~0.3 part, aniline 1~1.5 part, ethanol 1~2 part, DTPMPA 1~2 part, calcium chromate 0.2~0.5 part, potassium nitrate 1~2 parts, 0.1~0.5 parts of EDTA, 3~8 parts of water. The water-based pickling corrosion inhibitor passivator for stainless steel has the advantages of non-toxicity, environmental protection, good passivation effect and the like.

Description

technical field [0001] The invention belongs to the technical field of stainless steel manufacturing, and in particular relates to an aqueous pickling stainless steel corrosion inhibitor and passivator and a preparation method thereof. Background technique [0002] Stainless steel has the characteristics of good corrosion resistance, high temperature resistance, low temperature resistance, wear resistance and beautiful appearance. It has a wide range of uses and is an important steel material for the development of various sectors of the allergic economy. Stainless steel materials are widely used in aerospace, atomic energy, ocean development, petrochemical, automobile, architectural decoration, household appliances, kitchen utensils and other industries. [0003] During the processing of stainless steel, it will cause surface defects, hidden dangers of corrosion, black scale and other metal compounds, yellow welds and grease during cold drawing, etc. In order to improve the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C22/33C23F11/04
CPCC23C22/33C23F11/04
Inventor 季吉清
Owner SUZHOU JILI STAINLESS STEEL PROD