JPS55128146A - Measuring method for concentration of chromium on surface of stainless steel - Google Patents

Measuring method for concentration of chromium on surface of stainless steel

Info

Publication number
JPS55128146A
JPS55128146A JP3608979A JP3608979A JPS55128146A JP S55128146 A JPS55128146 A JP S55128146A JP 3608979 A JP3608979 A JP 3608979A JP 3608979 A JP3608979 A JP 3608979A JP S55128146 A JPS55128146 A JP S55128146A
Authority
JP
Japan
Prior art keywords
stainless steel
chromium
current density
concentration
curve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3608979A
Other languages
Japanese (ja)
Other versions
JPS5952982B2 (en
Inventor
Tetsutaro Ogushi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Kinzoku Co Ltd
Original Assignee
Nippon Kinzoku Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Kinzoku Co Ltd filed Critical Nippon Kinzoku Co Ltd
Priority to JP54036089A priority Critical patent/JPS5952982B2/en
Publication of JPS55128146A publication Critical patent/JPS55128146A/en
Publication of JPS5952982B2 publication Critical patent/JPS5952982B2/en
Expired legal-status Critical Current

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  • Investigating And Analyzing Materials By Characteristic Methods (AREA)

Abstract

PURPOSE: To measure the titled concentration of chromium accurately, simply and for a short time including the distribution of the concentration of chromium in the direction of depth, by immersing stainless steel in a solution to result in positive polarization to a superpassive state region, and by measuring a change on standing of current density during the positive polarization.
CONSTITUTION: The current density value of stainless steel materials is measured which has the various concentrations of chromium under a stationary state in a superpassive state region. The stainless steel materials are then immersed in a solution, whose composition and temperature are the same as those of a solution which has been used to measure the current density value of the stainless steel materials under the stationary state. Variations (called I-T curve for short) in a current density value (I) to the time (T) elapsed in the case when the electric potential is immediately set in the superpassive state region are measured. A point in this curve, at which a steady-state current density value resulting from the surface of the stainless steel basic materials appears, is obtained by variations in the inclination of the curve. Thus, the density of chromium is grasped. The concentration of chromium in the direction of depth of stainless steel can also be measured on the basis of the I-T curve.
COPYRIGHT: (C)1980,JPO&Japio
JP54036089A 1979-03-27 1979-03-27 Method for measuring chromium concentration on stainless steel surface Expired JPS5952982B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54036089A JPS5952982B2 (en) 1979-03-27 1979-03-27 Method for measuring chromium concentration on stainless steel surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54036089A JPS5952982B2 (en) 1979-03-27 1979-03-27 Method for measuring chromium concentration on stainless steel surface

Publications (2)

Publication Number Publication Date
JPS55128146A true JPS55128146A (en) 1980-10-03
JPS5952982B2 JPS5952982B2 (en) 1984-12-22

Family

ID=12460018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54036089A Expired JPS5952982B2 (en) 1979-03-27 1979-03-27 Method for measuring chromium concentration on stainless steel surface

Country Status (1)

Country Link
JP (1) JPS5952982B2 (en)

Also Published As

Publication number Publication date
JPS5952982B2 (en) 1984-12-22

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