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Aluminium material two-step chemical polishing method capable of reducing NO2 smoke hazard

A chemical polishing and NO2 technology, applied in the field of surface treatment of aluminum materials, can solve the problems of inability to fundamentally eliminate NO2 harm, unstable polishing effect, etc., achieve good polishing gloss effect, reduce NO2 yellow smoke harm, and reduce NO2 yellow smoke harm Effect

Inactive Publication Date: 2006-08-23
周国斌 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many disclosed patents have been proposed in the past, such as USP3119726 "Process and composition for brightening Aluminum", USP3301787 "Chemical brightenin of Aluminum", USP3202612 "Chemical brightening of Aluminum", etc., have proposed NH 4 + It can suppress the NO produced during the tri-acid polishing process of aluminum materials 2 Yellow smoke, but heavy use of NH 4 + Will consume a lot of free H in the polishing solution 3 PO 4 , at the same time cause the instability of the polishing effect, so so far, with a single NH 4 + Inhibition methods cannot fundamentally eliminate NO 2 the harm of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0013] Different NH 4 Salt concentration vs. NO 2 The suppression effect of yellow smoke is shown in Table 1

[0014] The weight percentage of other components of bath liquid: H 2 SO 4 4%, Cu salt 0.01%, Al 3+ 0%, the reaction temperature is 100°C, and the reaction time is 2 minutes.

[0015] Basic Bath Components

experiment example 2

[0017] Increase HNO 3 The smoke suppression effect after concentration is shown in Table 2

[0018] Other component weight percent of bath liquid:, H 2 SO 4 4%, Cu salt 0.01%, Al 3+ 0%, the reaction temperature is 100°C, and the reaction time is 2 minutes.

[0019] Basic Bath Components

experiment example 3

[0021] Change H 2 SO 4 NO 2 The influence of yellow smoke is shown in Table 3

[0022] Bath main components

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PUM

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Abstract

The two-step chemical aluminum material polishing process with less NO2 smoke hazard belongs to the field of aluminum material surface treating technology. The two-step chemical aluminum material polishing process with three kinds of acid includes the first step of eliminating Al2O3 film on the surface of aluminum material and leveling surface while inhibiting NO2 generation, and the second step of further polishing. The present invention regulates the components of the solution in the polishing tank and controls reaction speed to decrease yellow NO2 smoke while ensuring the high aluminum material polishing effect. The present invention is used mainly for aluminum surface treatment.

Description

technical field [0001] The invention relates to the surface treatment technology of aluminum materials, in particular to a method for chemical polishing treatment on the surface of aluminum profiles that can reduce NO 2 Two-step chemical polishing method for smoke-damaged aluminum. Background technique [0002] For aluminum triacid (H 3 PO 4 、HNO 3 、H 2 SO 4 ) A large amount of NO is produced during chemical polishing surface treatment 2 The danger of yellow smoke has been explored by many professional technicians all over the world over the years. 2 suppression methods, but so far, NO 2 Harm is still the main problem that plagues the production and development of aluminum chemical polishing surface treatment. Many patents that have been disclosed in the past have been proposed, such as USP3119726 "Process and composition for brightening Aluminum", USP3301787 "Chemical brightenin of Aluminum", USP3202612 "Chemical brightening of Aluminum", etc., have proposed NH 4 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/03
Inventor 周国斌李国有
Owner 周国斌
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