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Electroplating degreasing agent for secondary cold rolled material

A technology of secondary cold rolling and degreasing agent, which is applied in the field of electroplating degreasing agent, which can solve the problems of affecting production efficiency, rising oil content, poor cleaning effect, etc., and achieves the effects of convenient feeding, slowing down the aging speed, and easy wastewater treatment

Active Publication Date: 2010-01-20
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The degreasing agent with this composition makes the grease and water cleaned from the surface of the steel strip completely mixed. The oil content of the cleaning solution increases continuously and the alkalinity decreases continuously during the use of the cleaning solution, resulting in poor cleaning effect in the later stage and prone to roll marks.
In addition, this degreasing agent is solid. In order to achieve full dissolution, it must be slowly added to water to prepare a cleaning solution, which affects production efficiency.
The degreasing agent with this kind of composition will also produce a lot of foam during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Potassium hydroxide 25%

[0029] Potassium gluconate 2%

[0030] Organic polymer complexing agent (9EO+10PO) 13%

[0031] Surfactant (HAS) 4%

[0032] Water 56%

[0033] Table 1 Changes in the amount of oil and alkalinity in the working fluid during use of Example 1

[0034]

[0035] From Table 1 above, it can be seen that the residual grease washed from the second cold-rolled original plate is not continuously dissolved in the lye, but is removed in time by overflow, and the alkalinity of the working fluid is maintained well without obvious decline.

Embodiment 2

[0037] Potassium hydroxide 23%

[0038] Potassium gluconate 4%

[0039] Organic polymer complexing agent (9EO+10PO) 8%

[0040] Surfactant (HAS) 5%

[0041] Water 60%

[0042] The alkalinity of the working solution of Example 2: 31.65 g / l.

Embodiment 3

[0044] Potassium hydroxide 20%

[0045] Potassium gluconate 2%

[0046] Organic polymer complexing agent (9EO+10PO) 5%

[0047] Surfactant (HAS) 3%

[0048] Water 70%

[0049] The alkalinity of the working solution of Example 3: 28.76g / l.

[0050] After using the cleaning agent of the present invention (the formula of Example 1), the production efficiency of the secondary cold-rolled material (ie DR material) and the comparison of the roll print defects with historical data are shown in Table 2:

[0051] Table 2 Comparison of the cleaning agent of the present invention before and after use

[0052]

[0053] It can be seen from Table 2 above that after using the cleaning agent of the present invention, the roll printing production efficiency is improved, and the roll printing defects are greatly reduced.

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PUM

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Abstract

The invention relates to a metal degreasing agent, in particular to an electroplating degreasing agent for a secondary cold rolled material. The electroplating degreasing agent for the secondary cold rolled material comprises the following chemical components in percentage by weight: 20 to 25 percent of potassium hydroxide, 1 to 4 percent of potassium gluconate, 5 to 13 percent of organic polymer complexing agent, 3 to 5 percent of surfactant, and the balance of water. The organic polymer complexing agent is 9EO+10PO and the chemical name thereof is polyoxypropylene polyoxyethylene block copolymer. The surfactant is HAS and the chemical name thereof is hydroxylamine sulfate. The electroplating degreasing agent for the secondary cold rolled material has very strong moistening and stripping functions on dirt, and the stripped greasy dirt floats on the liquid surface, is easy to discharge and rinse; besides, the electroplating degreasing agent avoids the white spot problems and the tinning defects on a tin plate and reduces the roll marks defects.

Description

Technical field [0001] The invention relates to a metal degreasing agent, in particular to an electroplating degreasing agent for secondary cold-rolled materials. Background technique [0002] There are currently three main cleaning principles for electroplating degreasing agents: emulsification, saponification and wetting. The formula of the electroplating degreasing agent for secondary cold-rolled materials in the prior art is as follows (by weight percentage): [0003] Sodium hydroxide 40~45% [0004] Sodium carbonate 20~25% [0005] Inorganic complexing agent (sodium tripolyphosphate) 20-25% [0006] Nonylphenol 2~3% [0007] Emulsifier (OP) 1~3% [0008] The cleaning principle of this degreasing process is mainly emulsification and saponification. Emulsification makes the oil beads evenly distributed in the aqueous solution to form a mixed liquid. Nonylphenol is a non-ionic surfactant, and its hydrophilic-lipophilic-balance value HLB ranges from about 3 to 5 and about 13 to 15 re...

Claims

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Application Information

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IPC IPC(8): C23G1/19
Inventor 周庚瑞
Owner BAOSHAN IRON & STEEL CO LTD
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