Corrosion display method for 300M steel grain size

Corrosion display method for 300M steel grain size

  • CN 106,092,708 B
  • Filed: 06/06/2016
  • Issued: 02/04/2020
  • Est. Priority Date: 06/06/2016
  • Status: Active Grant
First Claim
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1. The corrosion showing method of the grain size of 300M steel is characterized by comprising the following steps of:

  • (1) pretreating a 300M steel grain size sample, wherein the tempering temperature of 300M steel is 470 ℃

    ;

    (2) preparing a corrosive agent of a 300M steel grain size sample;

    (3) heating the prepared corrosive agent to 33 ℃

    , and keeping the temperature constant;

    (4) putting the processed 300M steel grain size sample into a corrosive agent with constant temperature;

    (5) continuously wiping the corrosion surface of the 300M steel grain size sample in the corrosion process, and taking out the 300M steel grain size sample after wiping for 10-20 minutes;

    (6) washing a 300M steel grain size sample by flowing cold water, and scrubbing corrosion traces on a corrosion surface of the sample while washing;

    (7) after cleaning, dripping alcohol on the corrosion surface of the 300M steel grain size sample, and then drying the sample;

    (8) and finally, observing the appearance of the 300M steel grain size sample and evaluating the grain size grade of the sample.

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