Title:
METHOD FOR EVALUATING CLEANLINESS OF STEEL MATERIALS
Document Type and Number:
WIPO Patent Application WO/2019/203545
Kind Code:
A1
Abstract:
A method for evaluating the cleanliness of steel materials, according to an embodiment of the present invention, comprises the steps of: providing a steel specimen; allowing hydrogen to penetrate the specimen by means of an electrochemical method; quantifying blisters by counting the number of the blisters generated on the surface of the specimen by the hydrogen having penetrated therein; and comparing the quantified number of the blisters with the reference number of blisters so as to evaluate whether the steel material is suitable for shipment. Compared to a conventional evaluation method, a method for evaluating the cleanliness of steel materials, according to an embodiment of the present invention, clearly shows blisters on the surface of a specimen. Therefore, reliability for the evaluation of the cleanliness of steel materials is improved over that of a conventional method.
Inventors:
WON YOUNG MOK (KR)
PARK IN BEOM (KR)
PARK IL JEONG (KR)
PARK IN BEOM (KR)
PARK IL JEONG (KR)
Application Number:
PCT/KR2019/004592
Publication Date:
October 24, 2019
Filing Date:
April 16, 2019
Export Citation:
Assignee:
POSCO (KR)
International Classes:
G01N27/30; G01N17/00; G01N33/20
Foreign References:
| KR20120061102A | 2012-06-13 | |||
| JPH05223808A | 1993-09-03 | |||
| JP2008261742A | 2008-10-30 | |||
| KR20070016316A | 2007-02-08 | |||
| KR20060070036A | 2006-06-23 |
Attorney, Agent or Firm:
NAM, Seung-Hee (KR)
Download PDF:
Previous Patent: DEVICE HANDLER
Next Patent: NON-SURFACTANT TYPE OIL-WATER DISPERSION COMPOSITION, NON-SURFACTANT TYPE WATER-OIL DISPERSION COMPO...
Next Patent: NON-SURFACTANT TYPE OIL-WATER DISPERSION COMPOSITION, NON-SURFACTANT TYPE WATER-OIL DISPERSION COMPO...