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1、J IS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Method of electrochemical potentio kinetic reactivation ratio measurement for stainless steels ICs 77.060; 77.140.20 Reference number : &IS G 0580 : 2003 (E) PROTECTED BY COPYRIGHT 5s Copyright Japanese Stan
2、dards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,- G 0580 : 2003 Foreword This translation has been made based on the original Japan
3、ese Industrial Standard revised by the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by the Japan Stainless Steel Association (JSSA)/the Japanese Standards
4、 Association (JSA) with the draft being attached, based on the provision of Article 12 Clause 1 of the Industrial Standardization Law applicable to the case of revision by the provision of Article 14. Consequently JIS G 0580 : 1986 is replaced with this Standard. Date of Establishment: 1986-02-01 Da
5、te of Revision: 2003-03-20 Date of Public Notice in Official Gazette: 2003-03-20 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Iron and Steel JIS G 0580 : 2003, First English edition published in 2003-07 Translated and published by: Japanese Standard
6、s Association 4-1-24, Akacaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2003 Ali rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or b
7、y any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie N
8、ot for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,- G 0580 : 2003 Contents Scope Normative references Measuring apparatus Test solution . Test piece Measuring method . Reactivation ratio (R) . Page (i PROTECTED BY COPYRIGHT Copyright Japanese
9、Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS G 0580 : 2003 Method of electrochemical pote
10、ntiokinetic reactivation ratio measurement for stainless steel 1 Scope This Japanese Industrial Standard specifies the method for measurement of electrochemical potentiokinetic reactivation ratio hereafter referred to as “potentiokinetic reactivation ratio ( A ) ” from the reciprocating anode polari
11、zation curve in sulfuric acid containing potassium thiocyanate of austenitic stainless steel. 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amen
12、dments) indicated below shall be applied. JIS G 0551 Methods of austenite grain size determination for steel JIS K 8951 Sulfuric acid JIS K 9001 Potassium thiocyanate JIS R 6253 JIS Z 8401 Waterproof abrasive papers Guide to the rounding of numbers 3 Measuring apparatus The measuring apparatus shall
13、 be assembled with a potentiostat, an electric potential sweepage device, a recorder, a reference electrode, an electrolytic bath and a thermostatic bath. The reference electrode is generally connected to a Luggin capillary via a liquid bridge and an agar bridge. The flap of the Luggin capillary is
14、installed at a position approximately 1 mm from the surface at the central part of the test surface of the test piece. Fig. 1 shows example of a measuring apparatus. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/111111100
15、1, User=Wing, Bernie Not for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,- 2 G 0580 : 2003 Potentiostat Luggin capillary Fig. 1 Assembly diagram of measuring apparatus (example) 4 Test solution For the test solution, guaranteed grade sulfuric a
16、cid (about 1.84 in density) specified in JIS K 8951 is made 0.5 moli f 0.05 molA sulfuric acid solu- tion (1.032 in density) with distilled water or deionized water and 1.0 g of guaran- teed grade potassium thiocyanate specified in JIS K 9001 is dissolved with this 0.5 mou sulfuric acid solution to
17、1 O00 ml to prepare the 0.5 mol/l sulfuric acid -0.01 molA potassium thiocyanate solution. Because potassium thiocyanate has high deliquescence property, it shall be necessarily weighed quickly with a weighing bottle. Information : 5 Test piece The test piece shall conform to the following respectiv
18、e items: The test area shall generally be of 1 cm2. The preparation method of test piece shall generally be by cutting or grinding. When inevitably sheared, the region to be influenced by shearing shall be re- moved by witting or grindin3g so that the test surface is free from influences by strain.
19、For the test surface, the test piece surface free from thermal affects due to cut- ting, soldering, etc. shall be used. The test surface shall be wetly ground with the abrasive paper specified in JIS R 6253 to P120 min. and sufficiently washed with water or alcohol. The connection of a test piece to
20、 a lead wire shall be carried out by soldering, spot welding, conductive coating, etc. The part other than the test surface shall be covered with insulating material of eminent chemical resistance ( 1 ) . PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license w
21、ith JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,- 3 G 0580 : 2003 g) The crystal grain size number of a test surface or a surface equal in quality thereto shall be obtained in acco
22、rdance with JIS G 0551. Note (1) Because the selection and the covering method of insulation material sometimes influence on the results, cares shall be necessarily taken therefor. 6 Measuring method spective items: The measuring method shall conform to the following re- The temperature of test solu
23、tion shall be at 30 “C -t- 1 “C. The amount of test solution shall be 200 ml min. New test solution shall be used for each test. The electric potential sweepage speed shall be 100 mV/min i . 5 mV/min. Completely immerse the test surface into the test solution, quickly adjust the position of Luggin c
24、apillary and allow this state to stand for 5 min. Then, after confirming that the natural electrode potential of test piece is in an active con- dition with an electrometer, carry out anode polarization from natural electrode potential with a potentiostat and an electric potential sweepage device. A
25、fter reaching +0.3 V (saturated calomel electrode standard), immediately sweep the electric potential in the reverse direction. After potentiokinetic reactiva- tion, allow the electric potential at which anode current becomes zero to be the end point. Further, when the immersed test piece does not i
26、ndicate a natural electrode potential of -0.35 V (saturated calomel electrode standard) max., keep the test piece constant at a fixed potential of -1.0 V (saturated calomel electrode stan- dard) for 1 min. Thereafter, let it stand in an open circuit condition for 5 min and activate it. Information :
27、 The electric potential of active condition is generally -0.35 V (satu- rated calomel electrode standard) max. Obtain the maximum anode current density i, and i, in active conditions of go- ing path and returning path from the anode polarization curve given in Fig. 2 which is obtained with a recorde
28、r or the like. After the test, observe the test surface with the magnifying glass of 10 magni- fications min. When evident corrosion is observed in the covered part, it shall be omitted from the test results. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under licen
29、se with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,- 4. G 0580 : 2003 Returning path I l I I I A Goingpath 1 I Polarization start I l I I I I l I I l 1 ir I Ia 6 Anode current den
30、sity (logarithmic) Fig. 2 Drawing of going and returning anode polarization curve 7 Reactivation ratio (RI The reactivation ratio (R) shall be as follows. a) The measured value (E,) of reactivation ratio is obtained according to the fol- lowing formula. Er La R, = -x 100 where, R, : measured value o
31、f reactivation ratio (%) i, : maximum anode current density in active condi- tion of returning path i, : maximum anode current density in active condi- tion of going path The reactivation ratio (RI shall be obtained by correction of crystal grain size in measured value (R,) of reactivation ratio acc
32、ording to the following formula. b) where, R : reactivation ratio (%) R , : measured value of reactivation ratio N : grain size number of test surface The numerical value is displayed by rounding off to the second decimal place in accordance with JIS Z 8401. PROTECTED BY COPYRIGHT Copyright Japanese
33、 Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,- Errata for JIS (English edition) are printed in Standardization JoumE, publi
34、shed monthly by the Japanese Standards Association, and also provided to subscribers of JIS (English edition) in Monthly Information. Errata will be provided upon request, please contact: Standardization Promotion Department, Japanese Standards Association 4- 1-24, Akasaka, Minato-ku, Tokyo, 107-844
35、0 JAPAN TEL. 03-3583-8002 FAX. 03-3583-0462 100% Recycled paper PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:35:41 MSTNo reproduction or networking permitted without license from IHS -,-,-