Method for detecting content of silicon in aluminum alloy based on developing technique

Abstract

The invention discloses a method for detecting content of silicon in aluminum alloy based on a developing technique. The method comprises the following steps: respectively testing absorbance values of a master standard solution and a test sample solution by using a spectrophotometer, and calculating the silicon content value of the test sample solutions, wherein the step of respectively testing the absorbance values of the master standard solution and the test sample solution by using the spectrophotometer comprises the following sub-steps: 1, preparing the solutions, 2, sampling, and 3, testing the absorbance values; the step of calculating the silicon content values comprises a step of calculating the silicon content value of the test sample solution according to the tested absorbance value of the master standard solution and the tested absorbance value of the test sample solution. The method is simple and rapid in detection process, only once heating and once cooling are needed, the content of silicon can be rapidly provided for a user, the possibility of rapidness in stokehold non-instrumental analysis on cast aluminum is achieved, the rapidness and accuracy in testing are ensured under different room temperature conditions, and meanwhile due to the stability of a developing liquid self, the possibility of rapid testing on multiple test samples is achieved.

Description

technical field [0001] The invention relates to a method for detecting silicon content, in particular to a method for detecting silicon content in an aluminum alloy with a silicon content of 0.1% to 13% based on color development technology. Background technique [0002] The detection method of silicon content in aluminum alloy mainly includes the determination of silicon content from 0.x% to 1x% in deformed aluminum alloy and cast aluminum alloy. At present, the commonly used measurement methods mainly include: [0003] 1. "Light Metals" No. 7, 1999 "Rapid Determination of Silicon Content in High-Si Aluminum Alloys by Spectrophotometry", the technical plan is: Weigh 0.1g sample into 100mL silverware, add 10mL hydrogen with a mass concentration of 25% Sodium oxide solution, heat to dissolve, cool slightly; wash the solution into a 250mL volumetric flask containing 40mL hydrochloric acid (1+1) with boiling water, shake until the precipitate dissolves; wash silver with 2 drop...

AI Technical Summary

Problems solved by technology

[0011] (1) Only applicable to samples with a silicon content above 5%;

[0012] (2) When the room temperature is zero degrees Celsius, whether there will be an ice-water mixture in the chromogenic solution, and whether it will take a long time for the color to develop completely are not mentioned, and the reliability and accuracy are not supported by data;

[0013] (3) After the sample solution is dissolved in the alkali solution, the solution becomes yellow or brownish-yellow after being acidified with acid, and there is interference, which leads to inaccurate measurement results

[0014] (4) The analysis process must be heated twice and cooled twice, and the analysis time is long;

[0015] (5) After adding ammonium molybdate for color development, it must be placed at room temperature for 15-30 minutes or heated in a boiling water bath for 30 seconds, then add a certain amount of acid reducing agent to reduce it to silicon molybdenum blue for colorimetric determination. The room temperature environment is placed for a long time, thereby further Increased analysis time;

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