Title:
METHOD FOR MEASURING ATTACHED AMOUNT OF METAL CHROMIUM ON TIN-FREE STEEL SHEET
Document Type and Number:
Japanese Patent JP3394132
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide the method for measuring the attached amount of metal chromium on a tin-free steel sheet.
SOLUTION: Metal chromium on a tin-free steel sheet undergoes electrolysis, and Faraday's law is applied on the relationship between the electrolytic time and the quantity of electricity. Thus, the attched amount of the metal chromium in a sample is measured. At this time, the tip of a conducting contact point 11A for conducting the current through the sample S is directly brought into contact with a metal chromium layer S2 located at the lower side of a chromium oxide layer S3 at the uppermost layer of the sample S. Thus, the accurate and quick measurement of the attached amount of the metal chromium is realized.
Inventors:
Motohiro Yoshimura
Kazuhisa Okamoto
Kazuhisa Okamoto
Application Number:
JP4872196A
Publication Date:
April 07, 2003
Filing Date:
March 06, 1996
Export Citation:
Assignee:
Kawasaki Steel Co., Ltd.
International Classes:
G01N27/42; G01N27/416; (IPC1-7): G01N27/42; G01N27/416
Domestic Patent References:
| JP5288715A | ||||
| JP57168153A | ||||
| JP6116699A |
Attorney, Agent or Firm:
Eiichi Kobayashi