Cleaning agent for treating steel plate after annealing and before tin plating

A cleaning agent and annealing technology, applied in the field of steel plate cleaning agent after annealing and before tin plating, can solve the problems such as the cleaning efficiency of the cleaning agent is difficult to reach 95%, the surface of the steel plate is not cleaned cleanly, and the production speed of the tin plating production line is fast. Good cleaning effect, excellent rust resistance, good cleaning performance

Inactive Publication Date: 2013-09-11
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the production speed of the tin plating production line is fast, the cleaning efficiency of the existing cleaning agent is difficult to reach more than 95%, and it is easy to cause the surface of the steel plate to be not cleaned cleanly, and to provide a kind of cleaning performance after annealing before tin plating. Handling steel plate cleaner

Method used

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  • Cleaning agent for treating steel plate after annealing and before tin plating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 70% sodium hydroxide, 20% trisodium phosphate, 5% n-tetradecyl polyoxyethylene ether, 3% sodium oleate, and 2% triethanolamine by weight, and mix the above raw materials evenly to make an annealed plated Cleaning agent for tin pre-treatment steel plate 1.

[0022] Add cleaning agent 1 for pre-tinned steel plate after annealing directly to the water in the cleaning section before tinning, so that the weight percent concentration is 3%, and the annealed steel plate is cleaned at a cleaning temperature of 75°C, and the cleaning efficiency is 99%. Above, the residue on the steel plate surface is less than 6mg / m 2 .

Embodiment 2

[0024] Take 80% sodium hydroxide, 10% trisodium phosphate, 3% tetradecyl polyoxyethylene ether, 5% sodium oleate, and 2% triethanolamine by weight. Tin pre-treatment steel plate cleaning agent 2.

[0025] Add cleaning agent 2 for pre-tinned steel plate after annealing directly to the water in the cleaning section before tinning, so that the weight percentage concentration is 3%, and the annealed steel plate is cleaned at a cleaning temperature of 70°C, and the cleaning efficiency is 99.2% Above, the residue on the steel plate surface is less than 6mg / m 2 .

Embodiment 3

[0027] Take 72% sodium hydroxide, 12% trisodium phosphate, 6% n-tetradecyl polyoxyethylene ether, 7% sodium oleate, and 3% triethanolamine by weight, and mix the above raw materials evenly to make an annealed plated Cleaning agent for tin pre-treatment steel plate 3.

[0028] Add cleaning agent 3 for pre-tinned steel plate after annealing directly to the water in the cleaning section before tinning, so that the weight percent concentration is 4%, and the annealed steel plate is cleaned at a cleaning temperature of 80°C, and the cleaning efficiency is 99.3% Above, the residue on the steel plate surface is less than 6mg / m 2 .

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Abstract

The invention discloses a cleaning agent for treating a steel sheet after and before tin plating. The cleaning agent comprises the components, by weight: 70-80% of sodium hydroxide, 10-20% of trisodium orthophosphate, 3-7% of n-tetradecyl polyoxyethylene ether, 3-7% of sodium oleate, and 2-6% of triethanolamine. While in use, the cleaning agent for treating the steel plate after annealing and before tin plating is added into water to form a cleaning solution according to the weight percentage of 3-5%, a cold rolled steel sheet after annealing and before tin plating is cleaned in the cleaning solution at the temperature of 70-85 DEG C. The cleaning product for treating the steel sheet after annealing and before tin plating has no strong irritating smell, can be added into water of a cleaning stage before tin plating, is convenient and easy to use, and has good cleaning effect and cleaning efficiency of 99% or more. The steel sheet after cleaning has excellent rust resistance, and residues on the steel sheet surface are less than 6 mg/m<2>. The cleaning agent also has relatively good buffering capability of pH value, and still has good cleaning performance at certain cleaning temperature and certain concentration ranges.

Description

technical field [0001] The invention relates to a cleaning agent for tin-plated steel sheets, in particular to a cleaning agent for pre-tinned steel sheets after annealing. Background technique [0002] Chemical cleaning is the pre-treatment link of tin plating after annealing of cold-rolled strip steel. The surface chemical cleaning process must be carried out before tin plating to remove oil particles and other surface residues on the metal surface. If the oil removal is not clean during the cleaning process, the oil will be brought into the tin plating process, which will affect the quality of tin plating products. [0003] At present, the main cleaning method of the tin plating production line is high-temperature alkali cleaning, and the cleaning temperature is 70-85°C. Oil stains on cold-rolled strips are generally three types of oil: vegetable oil, animal oil and mineral oil, which can be divided into saponifiable oil and non-saponifiable oil according to their chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/18C23G1/19
Inventor 黄先球石争鸣刘建容张万灵郎丰军马颖程鹏李安平王靓
Owner 武汉钢铁有限公司
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