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Metal surface passivant

A technology of metal surface and passivation agent, which is applied in the field of metal surface treatment agent and passivator for metal surface, which can solve the problems of polluting the environment and achieve the effects of low cost, good passivation effect and convenient use

Inactive Publication Date: 2006-04-05
SHANGHAI WANSEN WATER TREATMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sodium nitrite, like phosphate, also has the problem of excessive discharge and environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] One. a kind of preferred preferred mode of metal surface passivator of the present invention:

[0016] First of all, a suitable passivating agent formula is prepared, and the formula selected in this embodiment is: cyclohexylamine: 30%; zinc sulfate: 24%; trisodium phosphate: 13%; water 33%, mixed at room temperature, fully Stir to form a concentrated metal surface passivator. When it needs to be used, it needs to be diluted in a certain proportion.

[0017] Two. the using method of metal surface passivator of the present invention:

[0018] 1. Carry out acid cleaning on the metal surface of the industrial cooling water circulation system, discharge the cleaning liquid after cleaning, and rinse the cleaning surface with clean water.

[0019] 2. Add the passivating agent of the above-mentioned preferred formula at a ratio of 1:12, and circulate and passivate continuously in the circulation system.

[0020] 3. Discharge the passivating agent after circulation and passiv...

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Abstract

The present invention pertains to the field of chemical industry, wherein a metal surface deactivation agent is disclosed, which comprises cyclohexylamine, zinc sulfate, trisodium phosphate and water. The deactivation agent can be used for metal surfaces after acid pickling against rusting and corrosion.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a metal surface treatment agent. Furthermore, the invention relates to a passivator for metal surfaces. Background technique [0002] Purifiers generally have the ability to form coatings or films on metal surfaces. After pickling, the metal surface needs to be neutralized and washed with water to remove the residual acid. Then, passivation agents need to be added for passivation treatment to prevent corrosion and rust on the activated surface of the metal after cleaning. Passivation is generally performed after cleaning (including neutralization and water rinsing). [0003] Phosphate is commonly used as a passivating agent in the passivation treatment of iron. For example, sodium phosphate can form a phosphate coating on the iron surface. This component is predicted to be iron phosphate. Recently, passivators other than phosphates have been used from the viewpoint of wastewater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/60C23C22/62C23C22/68
Inventor 沈志昌
Owner SHANGHAI WANSEN WATER TREATMENT CO LTD