Metallographic corrosive liquid used for 304L stainless steel and preparation method and corroding method thereof

A metallographic corrosion and stainless steel technology, applied in the preparation of test samples, etc., can solve the problems of unsatisfactory corrosion effect, not obvious grain boundary, and good corrosion effect, so as to adjust and optimize the production process and improve product quality , good corrosion effect

Inactive Publication Date: 2016-05-25
JINCHUAN GROUP LIMITED
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The metallographic structure of 304L stainless steel is usually corroded by aqua regia, and a mixture of nitric acid and alcohol is also used for corrosion, and electrochemical corrosion is also used. Aqua regia is used for more corrosion, but the effect of

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Metallographic corrosive liquid used for 304L stainless steel and preparation method and corroding method thereof
  • Metallographic corrosive liquid used for 304L stainless steel and preparation method and corroding method thereof
  • Metallographic corrosive liquid used for 304L stainless steel and preparation method and corroding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] A method for preparing a metallographic corrosion solution, firstly put ferric chloride into a beaker, then pour distilled water into the beaker, and finally pour concentrated hydrochloric acid into the beaker, stir evenly to fully dissolve the ferric chloride, and let stand It is configured as a metallographic etching solution for 5 minutes.

[0018] A metallographic corrosion method of 304L stainless steel, the 304L stainless steel sample is subjected to rough grinding, fine grinding, distilled water cleaning, ultrasonic cleaning, alcohol rinsing, and drying to make a sample to be tested; the sample to be tested is poured into the metallographic The corrosive solution submerged the sample to be tested for more than 2mm, corroded for 1 to 5 minutes, took out the sample and rinsed it with distilled water quickly, then rinsed it with alcohol, dried it to obtain a 304L stainless steel sample for metallographic observation, and observed it with a metallographic microscope; ...

Example Embodiment

[0019] Example 1

[0020] First put 4g of ferric chloride into the beaker, then pour 50ml of distilled water into the beaker, and finally pour 20ml of concentrated hydrochloric acid into the beaker. The iron is fully dissolved and left to stand for 5 minutes to configure a metallographic corrosion solution.

[0021] The as-cast 304L stainless steel is operated according to the above corrosion method, and the metallographic structure is as follows: figure 1 shown.

Example Embodiment

[0022] Example 2

[0023] First put 6.5g of ferric chloride into the beaker, then pour 50ml of distilled water into the beaker, and finally pour 10ml of concentrated hydrochloric acid into the beaker. The iron oxide is fully dissolved and left to stand for 5 minutes to configure a metallographic corrosion solution.

[0024] The 304L stainless steel in the cold working state is operated according to the above corrosion method, and the metallographic structure is as follows figure 2 shown.

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 metallographic corrosive liquid used for 304L stainless steel and a preparation method and a corroding method thereof. The metallographic corrosive liquid is prepared from 4-6.5 g of ferric trichloride, 10-20 ml of concentrated hydrochloric acid and 50 ml of water, wherein concentrated hydrochloric acid is analytically pure, and the mass fraction is 36-38%. The metallographic corrosive liquid is suitable for corroding 304L stainless steel metallographic specimen under different machining states and can corrode 304L stainless steel in a cast state or 304L stainless steel in a hot working state or a cold working state or 304L stainless steel metallographic structures which are subjected to heat treatment.

Description

technical field [0001] The invention relates to a metallographic corrosion solution for 304L stainless steel, a preparation method and an corrosion method thereof. Background technique [0002] The metallographic structure of 304L stainless steel is usually corroded by aqua regia, and a mixture of nitric acid and alcohol is also used for corrosion, and electrochemical corrosion is also used. Aqua regia is used for more corrosion, but the effect of aqua regia corrosion on 304L stainless steel depends on the alloy. In the processed state, the corrosion effect on the cast and annealed products is good, but the corrosion effect on the cold-worked state is not very ideal, and the grain boundary is not very obvious. Contents of the invention [0003] The first purpose of the present invention is to provide a metallographic corrosion solution with simple and reasonable design, good erosion effect, good display effect, and suitable for 304L stainless steel in different processing ...

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
IPC IPC(8): C23F1/28G01N1/32
CPCC23F1/28G01N1/32
Inventor 陈琴张海峰
Owner JINCHUAN GROUP LIMITED
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