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Hot-dip aluminizing technology for steel radiator

A radiator and hot-dip infiltration technology, which is applied in the hot-dip plating process, metal material coating process, solid-state diffusion coating, etc., can solve the problems of high cost and one-time investment increase, and achieve the effect of improving the service life

Inactive Publication Date: 2016-12-21
QUANJIAO SAIDELI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using copper pipes as water-passing parts can greatly increase the service life of the radiator and avoid water leakage caused by irregular heating systems, but the cost is expensive, which greatly increases the one-time investment

Method used

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Examples

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Effect test

Embodiment 1

[0015] A steel radiator hot-dip aluminizing process, comprising the steps of:

[0016] S1. Degreasing before hot dipping: first wash the radiator with water to remove surface impurities, then use a chemical degreasing agent to remove the oil on the surface of the radiator, and then wash with water after removing the oil;

[0017] S2. Rust removal before hot dipping: Heat the radiator workpiece after degreasing and cleaning in S1 to 300-350°C, keep the temperature for 10 minutes, take it out and cool it to room temperature, and then use 18-23% industrial hydrochloric acid Clean the radiator workpiece twice, each cleaning time is 12 minutes. After the first pickling, wash with water and then perform the second pickling. After the second pickling is completed, wash and neutralize the radiator workpiece with alkaline aqueous solution The pickling solution for the surface, the alkaline aqueous solution is a 5% sodium hydroxide solution;

[0018] S3. Helping treatment: add enough z...

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Abstract

The invention discloses a hot-dip aluminizing technology for a steel radiator, comprising the following steps: S1, degreasing before hot dipping; S2, rust removal before hot dipping; S3, assistant plating treatment; S4, hot-dip treatment; S5, diffusion treatment; and S6, treatment after aluminizing. According to the hot-dip aluminizing technology for a steel radiator, the surface of the steel radiator is aluminized such that a high-temperature-resistant alumina film is formed on the surface of the steel radiator and high-temperature molten aluminum can be immersed into the surface layer of the steel radiator to react with iron to generate a compact acid-and alkali-resistant aluminium oxide film. Thus, the internal iron is protected, and life of the steel radiator can be greatly prolonged. The hot-dip aluminized steel can be resistant to corrosion of multiple chemical mediums such as SO2, SO3, H2S, NH3, CO2, crude oil, seawater, organic acid and the like. The corrosion resistance of the hot-dip aluminized steel is several times even tens of times higher than corrosion resistance of non-aluminized carbon steel.

Description

technical field [0001] The invention belongs to the technical field of rust prevention for radiators, in particular to a hot-dip aluminizing process for steel radiators. Background technique [0002] Nearly one million tons of steel radiators are discarded due to corrosion every year across the country. Radiators are widely used in heating, heat dissipation, and heat exchange in buildings in various fields such as factories, institutions, and schools. The main objective factor that determines the service life of the radiator is the corrosion resistance of the metal; the media that provide the heat source for the radiator are mainly water and steam, and the corrosion of steel by the oxygen contained in them and the corrosive substances contained in water and steam is currently the most important factor. One of the big problems plaguing steel radiators. It requires that the oxygen content in the water is not greater than 0.05 g / m3. Although the hot water used by the radiator...

Claims

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Application Information

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IPC IPC(8): C23C2/12C23C2/34C23C2/02C23C10/02C23C10/22
CPCC23C2/02C23C2/12C23C2/34C23C10/02C23C10/22
Inventor 姚国富
Owner QUANJIAO SAIDELI MACHINERY
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