Analysis method of chromium content in chromium additive for aluminum alloy

An analysis method and additive 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 problems such as low efficiency, high cost, and inaccurate measurement results, and achieve Accurate measurement results, improved efficiency, and simple operation

Inactive Publication Date: 2012-06-13
哈尔滨东盛金材科技(集团)股份有限公司
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high cost, inaccurate measurement results and low efficiency of the existing determination method of chromium content in chromium additives. The invention provides an analysis method of chromium content in chromium additives for aluminum alloys

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0026] Embodiment 1: This embodiment is an analysis method for chromium content in chromium additives for aluminum alloys, which is achieved through the following steps:

[0027] 1. Preparation of reagents: a. Sulfuric acid: mixed with concentrated sulfuric acid and water at a ratio of 1:4 by volume of concentrated sulfuric acid and water; Mix concentrated sulfuric acid with water to obtain dilute sulfuric acid, then mix dilute sulfuric acid and phosphoric acid in a ratio of 3:1 by volume to obtain sulfur-phosphorus mixed acid; c, silver nitrate solution: mass percent concentration is 2%; d , N-phenylanthranilic acid indicator: the concentration is 0.4g / L; e, ferrous ammonium sulfate standard solution: the concentration is 0.1mol / L; f, potassium dichromate standard solution: the concentration is 0.05mol / L ;

[0028] 2. Calibration of ferrous ammonium sulfate standard solution: Accurately measure 20.00mL of potassium dichromate standard solution (0.05mol / L) in step 1, 15mL of ...

specific Embodiment approach 2

[0038] Specific embodiment two: what this embodiment is different from specific embodiment one is that the ferrous ammonium sulfate standard solution described in step one is prepared by the following steps: take by weighing 40 grams of ferrous ammonium sulfate (analytical pure) and be dissolved in Dissolve in 700mL water and 300mL dilute sulfuric acid. Dilute sulfuric acid is obtained by mixing concentrated sulfuric acid and water at a volume ratio of 1:4. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0039] Specific embodiment three: what this embodiment is different from specific embodiment one or two is that the potassium dichromate standard solution described in the step 1 is prepared by the following steps: potassium dichromate (baseline pure) is put into oven Dry in a dry box at 160°C for half an hour, then put it in a desiccator and let it cool for an hour, accurately weigh 2.4517 grams, put it in a clean beaker, add water to dissolve it, transfer it to a 1L volumetric flask, and then make it to volume with water After reaching 1L, shake well to obtain potassium dichromate standard solution. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an analysis method of chromium content in a chromium additive for an aluminum alloy, solving the problems of an existing detection method of the chromium content in the chromium additive that the cost is high, the detected result is not accurate and the efficiency is low. The analysis method comprises the following steps of: titrating a potassium dichromate standard solution by an ammonium ferrous sulfate standard solution by consuming the ammonium ferrous sulfate standard solution with the volume of V1; utilizing the ammonium ferrous sulfate standard solution to titrate a chromium element in a chromium additive sample by consuming the ammonium ferrous sulfate standard solution with the volume of V; and calculating to obtain the chromium content by using a formula W%=C*V*M/3m, wherein C is the concentration of the ammonium ferrous sulfate standard solution, M is the molar mass of the chromium, and m is the mass of the chromium-powder additive sample. According to the invention, by utilizing a titration method, the analysis method has the advantages of simplicity in operation, capabilities of saving cost and improving efficiency, less interference and accurate detected result, and can solve the problems that the existing detection method is high in cost, inaccurate in the detected result and low in efficiency, thereby meeting the requirements of the modern industry production.

Description

technical field [0001] The invention relates to a method for analyzing chromium content in chromium additives for aluminum alloys. Background technique [0002] Chromium has a great influence on the structure, mechanical properties and stress corrosion resistance of aluminum alloys, so it is of great significance to determine the content of chromium in aluminum alloys and alloy additives. At present, the aluminum processing industry is based on the atomic absorption spectrometry (with chromium hollow cathode lamp) to determine the content of chromium in chromium additives. The following problems often exist in the application of this method: ① the initial investment and the cost of the experimental process are high; The composition is complex, and complex pretreatment is required for the sample. Even so, the interference of some chromium additives is still very serious, which makes the measurement result inaccurate; ③The time of dissolving the sample with hydrochloric acid i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79
Inventor 王磊张忠华张忠凯张盛田张忠坤王计贞
Owner 哈尔滨东盛金材科技(集团)股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap