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Degreasant composition

A degreasing agent and composition technology, applied in the direction of coating, metal material coating process, hot dip plating process, etc., can solve the problems of affecting quality, strong human skin, irritation, etc., and achieve the effect of increasing production costs

Active Publication Date: 2013-12-25
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of sodium silicate has its major limitations
On the one hand, sodium silicate, especially sodium orthosilicate, has a strong alkalinity and is highly irritating to human skin; on the other hand, the biggest problem with using sodium silicate is that it will generate free silicic acid when it encounters strong acid. It is easy to stick to the surface to be cleaned and become a water-insoluble film, which is not easy to remove and will seriously affect the quality of the next process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The chemical composition of the degreasing agent consists of the following mass percentages:

[0037] Sodium hydroxide: 24%,

[0038] Ammonium hydroxide: 1%

[0039] Sodium carbonate: 2%,

[0040] Sodium Phosphate: 1%,

[0041] Amine oxide: 3%,

[0042] EDTA-2Na: 1%,

[0043] Surfactant described in general formula (I): 3%

[0044] Sodium dodecylbenzenesulfonate: 1%

[0045] GPES type defoamer: 1.5%,

[0046] Water: balance.

[0047]The degreasing agent composition still maintains sufficient fluidity at minus 20°C, and has good covering ability on the surface to be cleaned.

Embodiment 2

[0049] The chemical composition of the degreasing agent consists of the following mass percentages:

[0050] Sodium hydroxide: 28%,

[0051] Ammonium hydroxide: 2%

[0052] Sodium carbonate: 1%,

[0053] Sodium Phosphate: 2%,

[0054] Amine oxide: 3%,

[0055] EDTA-2Na: 1%,

[0056] Surfactant described in general formula (I): 3%

[0057] Sodium dodecylbenzenesulfonate: 1%

[0058] GPES type defoamer: 1.5%,

[0059] Water: balance.

[0060] The degreasing agent composition still maintains sufficient fluidity at minus 20°C, and has good covering ability on the surface to be cleaned.

Embodiment 3

[0062] The chemical composition of the degreasing agent consists of the following mass percentages:

[0063] Sodium hydroxide: 30%,

[0064] Ammonium hydroxide: 1%

[0065] Sodium carbonate: 2%,

[0066] Sodium Phosphate: 2%,

[0067] Amine oxide: 3%,

[0068] EDTA-2Na: 1%,

[0069] Surfactant described in general formula (I): 3%

[0070] Sodium dodecylbenzenesulfonate: 1%

[0071] GPES type defoamer: 1.5%,

[0072] Water: balance.

[0073] The degreasing agent composition still maintains sufficient fluidity at minus 20°C, and has good covering ability on the surface to be cleaned.

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Abstract

The invention discloses a degreasant composition for a hot-dip galvanized wire. The degreasant composition is used for surface treatment in steel rolling. The high-efficiency degreasant composition for the hot-dip galvanized wire comprises the following chemical components by mass: 20 to 35% of an alkali metal hydroxide, 1 to 5% of a second alkali source, 1 to 10% of an inorganic degreasing auxiliary agent, 1 to 10% of an organic degreasing auxiliary agent, 1 to 5% of a surfactant and 0.5 to 5% of an de-foaming agent, with the balance being water. The degreasant composition provided by the invention does not contain silicate, allows a hot dip galvanizing coating to have good adhesion and is applicable to degreasing of the hot-dip galvanized wire; the GPES de-foaming agent used in the degreasant composition can more effectively improve a degreasing effect under the condition of no inclusion of silicate and does not generate foam in use. The degreasant composition has the advantages of simple composition, usage of cheap and easily available raw materials, good stability, no corrosion to a metal material, high degreasing efficiency, friendliness to the environment, applicability to a low temperature environment, capacity of guaranteeing subsequent galvanizing quality in steel rolling, etc.

Description

technical field [0001] The invention relates to a degreasing agent composition, in particular to a degreasing agent used for hot-dip galvanizing line during surface treatment of rolled steel. Background technique [0002] Rolled steel galvanized sheet has good corrosion resistance, and has been more and more widely used in industries such as automobiles, machinery, and home appliances. Since there is a mixture of grease and iron powder remaining on the surface of the hot-rolled coil, it is very harmful to the further processing of the subsequent coating. It must be removed through the degreasing process, otherwise the quality of galvanizing cannot be guaranteed. Therefore, in order to improve the output and quality of galvanized products, reduce the iron content in the zinc pot and the hydrogen consumption in the furnace, the degreasing treatment before galvanizing is particularly critical. The current degreasing agents for hot-dip galvanizing lines have disadvantages such ...

Claims

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Application Information

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IPC IPC(8): C23G1/19C23C2/02
Inventor 徐红波张婉萍张晓顺王舰王静
Owner UNIV OF SCI & TECH LIAONING
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