Method for analyzing aluminum alloy oxidization solution

An oxidation solution and analysis method technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems of large error in analysis results, complicated operations, and difficult judgment of the end point. , to achieve the effect of high accuracy, simple and effective analysis method, and strong practicability

Inactive Publication Date: 2011-06-29
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are a small amount of analytical methods for the sulfuric acid-oxalic acid system, the analytical methods for oxalic acid are inaccurate, and the existing analytical methods for triacid systems such as sulfuric acid-oxalic acid-tartaric acid are complicated to operate, have poor reproducibility, and are difficult to judge the end point. The error of the analysis results is large, and there is an urgent need for a bath solution analysis method matching this system, so that the sulfuric acid-oxalic acid-tartaric acid hard anodic oxidation technology can be widely used

Method used

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  • Method for analyzing aluminum alloy oxidization solution
  • Method for analyzing aluminum alloy oxidization solution
  • Method for analyzing aluminum alloy oxidization solution

Examples

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Effect test

Embodiment 1

[0033] Example 1 The analysis results of the original analysis method to the triacid oxidation system

[0034] (1) Analysis of sulfuric acid content

[0035] In the original analysis method, chrome black T was used as the indicator, and the titration with zinc sulfate standard solution until the solution was reddish-purple was the end point. Calculation formula

[0036]

[0037] In the formula:

[0038] C E —concentration of EDTA standard solution;

[0039] C Zn - concentration of zinc sulfate standard solution;

[0040] V Zn - the number of milliliters of zinc sulfate standard solution consumed;

[0041] 50 - the number of milliliters of EDTA standard solution consumed;

[0042]98 - M sulfuric acid.

[0043] (2) Analysis of oxalic acid content

[0044] In the original analysis method, phenolphthalein was used as indicator, and the titration with zinc sulfate standard solution until the solution was reddish-purple was the end point. The calculation formula is th...

Embodiment 2

[0049] Embodiment 2 According to the analysis result of the present invention to the triacid oxidation system

[0050] Analysis method of the present invention to the analysis result of three acid oxidation system

[0051]

Embodiment 3

[0052] Example 3 Analytical results of the adjusted tri-acid oxidation working solution according to the present invention

[0053] If the three-acid oxidation working solution is supplemented with a sulfuric acid concentration of 125.80 g / L, an oxalic acid concentration of 20 g / L, and a tartaric acid concentration of 25 g / L, the supplementary formula is as follows:

[0054] C 0 V 0 =CV+m x

[0055] In the formula:

[0056] C 0 ——Concentration of working solution to be prepared

[0057] V 0 ——The volume of the working solution planned to be prepared

[0058] C - the concentration of a certain component of the bath solution after a period of use

[0059] V——The volume of the tank solution after a period of use

[0060] m x - the mass of a certain component that needs to be added

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Abstract

The invention relates to a method for analyzing aluminum alloy oxidization solution, and is characterized in that the method comprises the following steps: analyzing the sulfate radical content, analyzing the oxalic acid content, analyzing the tartaric acid content and analyzing the free acidity, the total acidity and the aluminum content. The method has the advantages that firstly, a more accurate and convenient and simpler analysis method is obtained; and secondly, through the adjusted analysis method, the relative measurement errors of sulfuric acid, oxalic acid and tartaric acid concentrations are respectively reduced from 20 percent, 5 percent and 20 percent to 1-4 percent, 0.05-3 percent and 2-4 percent. Meanwhile, the invention also provides a simple and feasible method for analyzing the free acidity, the total acidity and the Al3+content and a method for replenishing and maintaining work bath solution. The measurement results obtained through the analysis method meet the technological formula requirements. The method can be used by enterprises to measure the concentration of each component of the bath solution in a sulfuric acid and oxalic acid oxidization system or a sulfuric acid, oxalic acid and tartaric acid oxidization system. The analysis method is simpler to operate and has high practicability and accuracy.

Description

technical field [0001] The invention relates to an analysis method of a solution, in particular to an analysis method of an aluminum alloy oxidation solution. Background technique [0002] Anodizing is the most widely used and most successful technology in the surface technology of aluminum, and it is also the most in-depth and comprehensive technology of research and development. The anodic oxidation film of aluminum can effectively protect the aluminum substrate from corrosion, and it can also be dyed and colored, which is very decorative. Its porosity also makes it have some special functions, such as: electromagnetic function, catalytic function, sensing function and separation function. The hard anodic oxidation technology of aluminum alloy is based on anodic oxidation, with the hardness and wear resistance of the anodized film as the primary characteristics of anodic oxidation technology. It is generally used for general engineering applications or military applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 周雅周韦邵志松唐海花
Owner NANCHANG HANGKONG UNIVERSITY
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