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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 problems such as the inability to meet the clean requirements of advanced lubricating oil

Active Publication Date: 2012-11-28
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 one: a treatment method for the inner surface of a steel drum, comprising the following process steps:

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

[0021] (2) Degreasing: Add 13L of 2.5% aqueous solution of degreasing agent TL-9687 to the degreasing solvent tank, put the steel drum into the degreasing solvent tank for degreasing, the degreasing time is 2 minutes, the aqueous solution of degreasing agent TL-9687 The pH of the degreasing agent TL-9687 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, wash the degreased s...

Embodiment 2

[0028] Embodiment two: a treatment method for the inner surface of a steel drum, comprising the following process steps:

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

Embodiment 3

[0037] Embodiment three: a treatment method for the inner surface of a steel drum, comprising the following process steps:

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

[0039] (2) Degreasing: Add 14L of 2.6% aqueous solution of degreasing agent TL-9687 to the degreasing solvent tank, 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 degreasing agent TL-9687 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, wash the degreased stee...

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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 theindustrial production flow line.

Description

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

Claims

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Application Information

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