Alkaline detergent composition for steel sheet

A composition and detergent technology, applied in the field of alkaline detergent compositions, can solve the problems of loss of washing ability, increase of COD, and reduction of the upper limit of non-ionic surfactants, etc.

Inactive Publication Date: 2006-06-07
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem caused by the increase of acid value is that the rolled steel sheet will produce a large amount of iron soap, the rolling oil will damage its emulsification during washing, and the detergent will lose its washing ability
The problem with this method is that the inevitable solubilization leads to lowering of the upper limit of non-ionic surfactant to be added and the use of solubilizers which have absolutely no effect on washing the steel leads to an increase in COD

Method used

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  • Alkaline detergent composition for steel sheet
  • Alkaline detergent composition for steel sheet
  • Alkaline detergent composition for steel sheet

Examples

Experimental program
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Embodiment

[0052] Now, the present invention will be described in more detail below with reference to practical examples. However, it should be noted that these examples do not limit the present invention.

[0053] Preparation of Steel Sheet 1 for Washing

[0054] Steel sheet 1 for washing was prepared by the following method. Tables 1-1 to 1-7 show the results of tests performed on the steel sheets thus prepared by the following method. The steel sheet by cold rolling with tallow type rolling oil was cut into pieces having an area of ​​25 mm x 50 mm. The sheets were washed with n-hexane to remove rolling oil adhering to the surface. Then, it will be thermally degraded with ISOT tester in order to increase its viscosity at 100-150mm 2 The tallow type rolling oil purchased from the market in the / s range is coated on the sheet, and its amount is 200mg / m 2 .

[0055] Preparation of steel sheet 2 for washing

[0056] Steel sheet 2 for washing was prep...

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Abstract

Provided are an alkaline detergent composition excellent in cleaning, which allows steel sheets to be cleaned at low temperature and high speed, and a stable high-concentration alkaline detergent composition exhibiting fluidity. The composition according to the invention contains an alkaline agent and at least one polyoxyethylene alkyl ether, and/or at least one polyoxyalkylene ether. In addition, the compositions of the present invention contain, if desired, specific water-soluble macromolecular carboxylic and aldonic acids.

Description

[0001] This application is a divisional application of the invention patent application with the filing date of February 4, 1998, the application number of 98106415.9, and the invention title of "Alkaline Detergent Composition for Steel Sheets". technical field [0002] The present invention relates to an alkaline detergent composition for steel sheets for continuous washing of steel sheets (steel strips), for example especially in steel works by electrolytic cleaning of steel sheets. [0003] For surface treatments such as galvanization and coating, degreasing of the steel sheet surface and pretreatment with pickling are required. It is a very important factor for the quality of the final steel sheet. Dirty substances adhering to the surface of the steel sheet include, for example, rolling oils such as esters (such as tallow) fatty acids, and mineral oils, oil stains of anti-corrosion oils, and solid stains of iron powder deposited thereon during cold rolling . Among the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/14C23G1/18C23G1/19
CPCC23G5/032C25F1/00
Inventor 大桥秀巳滨井利正
Owner KAO CORP
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