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Aluminum pipe passivation technology

A technology of aluminum tube and process, applied in the field of aluminum tube passivation process, can solve the problems of uneven passivation of aluminum material, neglect of treatment process, improper treatment of aluminum material, etc., achieve good compactness, simple operation process, and improve uniformity Effect

Inactive Publication Date: 2017-01-25
ZUNYI HENG JIA ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current passivation treatment process, most enterprises only pay attention to the formula of passivation solution, while ignoring the various treatment processes of passivation, so that the aluminum material is not treated properly before and after passivation, making aluminum The passivation of the material is uneven and the quality is inconsistent

Method used

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Embodiment Construction

[0019] The present invention will be described in further detail below by means of specific embodiments:

[0020] The invention provides an aluminum tube passivation process, comprising the following steps:

[0021] Step 1. Degreasing: first put the aluminum tube into the alkaline pool for alkaline washing to remove the oil on its surface.

[0022] Step 2, a rinse: take the aluminum tube out of the alkaline pool, and rinse it with tap water to remove the residual lye on the aluminum tube.

[0023] Step 3. Passivation: After rinsing, transfer the aluminum tube into the passivation tank, which is filled with passivation solution to ensure that the passivation solution submerges the aluminum tube. The temperature of the passivation solution is 40-60°C , every 5min, test the temperature of the passivation solution with a thermometer, and the passivation time is 1h. During passivation, open the inlet and outlet valves of the passivation tank, and keep the flow of the passivation ...

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Abstract

The invention discloses an aluminum pipe passivation technology, which comprises the concrete steps of (1) removing oil: putting aluminum pipes into an alkali pool for alkali washing; (2) primarily rinsing: taking the aluminum pipes out of the alkali pool, and primarily rinsing through tap water; (3) passivating: after rinsing, transferring the aluminum pipes into a passivating tank for passivating; (4) secondarily rinsing: after passivating, secondarily rinsing through the tap water; (5) drying: arraying the aluminum pipes, and drying the aluminum pipes through a hot air blower; (6) detecting: adopting any one of a salt spray test, a hydrogen evolution method and a drop method for testing a corrosion property of the passivated aluminum pipes;(7) labeling: sticking passivated labels on the passed aluminum pipes. According to the aluminum pipes passivated by the technology, the compactness, the uniformity and the consistency of oxidation films on the surfaces of the aluminum pipes are good, and the quality is stable.

Description

technical field [0001] The invention belongs to the technical field of aluminum material processing, and in particular relates to an aluminum tube passivation process. Background technique [0002] Passivation is a method to transform the metal surface into a state that is not easily oxidized, and to delay the corrosion rate of the metal. In addition, the phenomenon of an active metal or alloy in which the chemical activity is greatly reduced and becomes a noble metal state is also called passivation. [0003] Aluminum has many advantages such as low density, high specific strength, good corrosion resistance, high electrical and thermal conductivity, weldability, good plasticity, easy processing and molding, and excellent surface decoration properties. Aluminum alloy is made of pure aluminum by adding some alloying elements. Aluminum alloy has better physical and mechanical properties than pure aluminum. Since aluminum is a relatively active metal, it can spontaneously for...

Claims

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Application Information

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IPC IPC(8): C23C22/73
CPCC23C22/73
Inventor 罗财求周毅志梁嘉耀
Owner ZUNYI HENG JIA ALUMINUM CO LTD