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Method for treating inner surface of steel drum

A treatment method and inner surface technology, applied in the direction of metal material coating process, etc., can solve the problems that cannot meet the cleanliness requirements of high-grade lubricating oil

Active Publication Date: 2011-01-26
WUXI SIFANG YOUXIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the packaging of generally uncoated steel drums cannot meet the cleanliness requirements of high-grade lubricants. It is necessary to find a chemical treatment method for the inner surface of steel drums to meet the cleanliness requirements, and it is produced in large quantities on industrial production lines.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A method for treating the inner surface of a steel drum, including the following process steps:

[0020] (1) Pre-degreasing: Add 2L of 2.5% degreasing agent TL-9687 aqueous solution to the pre-degreasing solvent tank, and put the steel drum into the pre-degreasing solvent tank for pre-degreasing. The pre-degreasing time is 2 minutes. The pH of the aqueous solution of TL-9687 is 12, and the temperature of the aqueous solution of the degreasing agent TL-9687 is 30°C;

[0021] (2) Degreasing: Add 13L of 2.5% aqueous solution of degreasing agent TL-9687 into the degreasing solvent tank, and put the steel drum into the degreasing solvent tank for degreasing. The degreasing time is 2 minutes, and the aqueous solution of degreasing agent TL-9687 The pH of the degreaser is 10, and the temperature of the aqueous solution of the degreasing agent TL-9687 is 30°C;

[0022] (3) The first water washing: at room temperature, the steel bucket after degreasing treatment is washe...

Embodiment 2

[0028] Embodiment 2: A method for treating the inner surface of a steel drum, including the following process steps:

[0029] (1) Pre-degreasing: Add 3L of 3% degreasing agent TL-9687 aqueous solution to the pre-degreasing solvent tank, and put the steel drum into the pre-degreasing solvent tank for pre-degreasing. The pre-degreasing time is 1 minute. The pH of the aqueous solution of TL-9687 is 13, and the temperature of the aqueous solution of the degreasing agent TL-9687 is 35°C;

[0030] (2) Degreasing: Add 15L of 3% aqueous solution of degreasing agent TL-9687 to the degreasing solvent tank, and put the steel drum into the degreasing solvent tank for degreasing. The degreasing time is 1 minute. The aqueous solution of degreasing agent TL-9687 The pH of the degreaser is 11, and the temperature of the aqueous solution of the degreasing agent TL-9687 is 35°C;

[0031] (3) The first water washing: at room temperature, the degreased steel bucket is washed in a washing tank, and the ...

Embodiment 3

[0037] Embodiment 3: A method for treating the inner surface of a steel drum, including the following process steps:

[0038] (1) Pre-degreasing: Add 2.5L of 2.8% degreasing agent TL-9687 aqueous solution to the pre-degreasing solvent tank, and put the steel drum into the pre-degreasing solvent tank for pre-degreasing. The pre-degreasing time is 1.5 minutes, and the degreasing The pH of the aqueous solution of TL-9687 is 12, and the temperature of the aqueous solution of degreaser TL-9687 is 33°C;

[0039] (2) Degreasing: Add 14L of 2.6% aqueous solution of degreasing agent TL-9687 into the degreasing solvent tank, and put the steel drum into the degreasing solvent tank for degreasing. The degreasing time is 1.5 minutes. The aqueous solution of degreasing agent TL-9687 The pH of the degreaser is 10, and the temperature of the aqueous solution of the degreasing agent TL-9687 is 32°C;

[0040] (3) The first water washing: at room temperature, the steel bucket after degreasing treatmen...

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Abstract

The invention relates to a method for treating the inner surface of a steel drum, which is characterized by comprising the following steps of: pre-degreasing: adding a degreasing agent solution A into a pre-degreasing solvent tank and placing the steel drum into the pre-degreasing solvent tank for pre-degreasing; degreasing: adding a degreasing agent solution B into a degreasing solvent tank and placing the steel drum into the degreasing solvent tank for degreasing: water washing: carrying out first water washing and second water washing on the degreased steel drum in a water washing tank at normal temperature; phosphating: adding a phosphating ion series film agent and water into a phosphating tank to obtain phosphating liquid and placing the steel drum into the phosphating liquid for phosphating; third and fourth water washing: carrying out third and fourth water washing on the phosphate steel drum in the water washing tank at normal temperature; and drying: drying the steel drum subjected to the fourth water washing in a suspension chain drying channel. The invention can meet the high cleanness requirement of high-grade lubricating oil and is suitable for mass production on the industrial production flow line.

Description

Technical field [0001] The invention relates to a method for processing the inner surface of a steel drum, in particular to a method for processing the inner surface of a high-cleanliness oil steel drum. Background technique [0002] With the rapid establishment of my country's market economy structure and the rapid expansion of the consumer market, lubricants are no longer a purely industrial product in the planned economy era. It has become an indispensable consumer product. In the process of social development, due to the characteristics of lubricating oil, the cleanliness requirement of steel drums is ≥ NAS (National Aerospace Standard NAS) level 7, so the cleanliness of the inner surface of the packaging steel drums must reach at least NAS level 7. Therefore, the packaging of steel drums without inner coating cannot meet the cleanliness requirements of advanced lubricants. A chemical treatment method for the inner surface of steel drums must be found to meet the cleanliness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07C23C22/78
Inventor 茆林凤
Owner WUXI SIFANG YOUXIN
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