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1、STD-JIS H BhBO-Z-ENGL 1778 4933608 05b5057 509 J IS . 1 W JAPANESE I N DUSTR IAL STANDARD Translated and Published by Japanese Standards Association Test methods for thickness of anodic oxide coatings on aluminium and aluminium alloys- Part 2 : Eddy current method IC6 25.220.20 Descriptors : alumini
2、um, aluminium alloys, anodizing, anodic coating, thickness measurement, eddy-current tests Reference number : JIS H 8680-2 : 1998 (E) 5 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:
3、39:25 MSTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS H 8680-2-ENGL 1998 4933b08 0565058 445 W H 8680-2 : 1998 Foreword This translation has been made based on the original Japanese Industrial Standard established by the Minister of International Trade and Industry
4、through deliberations at the Japanese Industrial Standards Commit- tee in accordance with the Industrial Standardization Law. Thereby, JIS H 8680 : 1993 was withdrawn, and the eddy current method in the withdrawn standard is replaced by this part 2. In this establishment, in order to help comparison
5、 of JIS with ISO, prepa- ration of JIS conforming to IS0 and proposal for a draft of International Standard based on JIS, among four kinds of measuring methods which have been specified in the former JIS H 8680 (1) Microscopical method, (2) Eddy current method and (3) Non-destructive measurement by
6、split- beam microscope are established as the respective standards of JIS H 8680-1, JIS H 8680-2, JIS H 8680-3, and (4) Determination of mass per unit area of anodic oxide coatings is separated from the series and established as JIS H 8688. Date of Establishment: 1998-11-20 Date of Public Notice in
7、Official Gazette: 1998-11-20 Investigated by: Japanese Industrial Standards Committee Divisional Council on Non-Ferrous Metals JIS H 8680-2 : 1998, First English edition published in 2000-08 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN
8、 in the event of any doubts arising as to the contents, the original JIS is to be the final authority. 4 O JSA2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
9、and microfilm, without permission in writing from the publisher. Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:39:25 MSTNo reproduction or networking permitted without
10、 license from IHS -,-,- STD=JIS H BbBO-Z-ENGL 1998 II 4933608 0565059 381 JAPANESE INDUSTRIAL STANDARD JIS H 8680-2 : 1998 Test methods for thickness OP anodic oxide coatings on aluminium and aluminium alloys- Part 2 : Eddy current method I Introduction This Japanese Industrial Standard has been pre
11、pared based on IS0 2360, Non-conductive coatings on non-magnetic basis metals-Measurement of coat- ings thickness-Eddy current method issued in 1982 without changing technical con- tents. Further, on the specification for coating thickness standard sheet, an Annex (informative) is newly added. “his
12、Standard speciwng the test method for the coat- ing thickness of anodic oxide coatings applied onto aluminium and aluminium alloys comprises three parts of the microscopical method, the eddy current method and the non-destructive measurement by split-beam microscope, and its application shall be sub
13、jected to the agreement according to the shape of a product, the kind of a coat- ing, the coating thickness, etc. between the supplier and the purchaser. 1 Scope This Standard specifies the coating thickness test method by the eddy current method for anodic oxide coatings (hereafter referred to as k
14、oatings”) which have been applied onto products of aluminium and aluminium alloys (hereafter re- ferred to as “products”). Remarks : The International Standard corresponding to this Standard is as fol- lows: IS0 2360 : 1982 Non-conductive coatings on non-magnetic basis met- als-Measurement of coatin
15、g thickness-Eddy cur- rent method 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. If the indication of the year of publication is given to these referred standards, only the edition of indicated year
16、 constitutes the provision of this Standard but the revision and amend- ment made thereafter are not applied. The normative references without the indi- cation of the year of publication apply limiting only to the most recent edition. JIS H 0201 : 1998 Glossary of terms used in the surface treatment
17、 of aluminium JIS H 8601 : 1992 Anodic oxide coatings on aluminium and aluminium alloys JIS Z 8401 : 1961 Rules for rounding off of numerical values 3 Definitions For the main terms used in this Standard, the definitions in JIS 7 H 0201 apply. 4 Summary This is a non-destructive measuring method tha
18、t when a high fre- through which a high frequency current flows to a test specimen, the impedance of the induction coil which varies according to the distance at that time is measured, and the obtained value is converted to a coating thickness. In this method, care shall be taken as the material of
19、the substrate, the roughness of the surface and the degree of flatness are liable to influence the measurements. 4 quency eddy current is generated on a substrate by approaching an induction coil Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/11
20、11111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:39:25 MSTNo reproduction or networking permitted without license from IHS -,-,- STDmJIS H BbBO-Z-ENGL 1998 E 4933b08 05b50b0 OT3 W 2 H 8680-2 1998 5 Measuring instrument The measuring instrument shall be as follows. The measuring instrument s
21、hall comprise an appropriate high-frequency oscilla- tor, a measuring probe (an induction coil), an impedance detector or the like, and shall be appropriately controlled by using the standard sheet for control in clause 6. 6 Coating thickness standard sheet The coating thickness standard sheet shall
22、 be as follows. a) Standard sheet for control The standard sheet for control is the standard sheet used for the detection for the function of a measuring instrument related to the reproducibility of a measured value and the calibration for the measur- ing instrument related to the preparation of the
23、 standard sheet for calibration, and that stated in 2 a) of Annex is used. b) Standard sheet for calibration The standard sheet for calibration is the stan- dard sheet used for the calibration for the measuring instrument related to the production management and product test, and either one stated i
24、n 2 b) or 2 c) of Annex is used. 7 Test piece The test piece shall be as follows. a) The measuring position shall be the significant surface of a product. However, when the product can not be tested, the test piece made of the same material(1) and prepared under the same treating condition(2) of coa
25、ting as those of the product may be used. b) The test piece is previously cleaned by using a soft cloth or the like dipped in a suitable solvent (3) depending on the stains. Notes (1) The grade, temper grade, and surface state before treatment of a material shall be the same as those of the product.
26、 (2) The pretreatment and treatment of a coating shall be carried out in the same bath and under the same condition as those for the prod- uct in order to obtain the same performance as that of the product. (3) The suitable solvents herein refers to acetone, ethanol, ethyl ether, methyl ethyl ketone
27、, etc. and those which corrode a test piece or form a protective coating shall not be used. 8 Operation The operation is executed in the following order. a) A probe is allowed to abut against the standard sheet for calibration, and the scale (an indicated value) is adjusted(4) according to the calib
28、ration method des- ignated for the measuring instrument. In the case where calibration is carried out by using a plastic film as the standard sheet for calibration, the calibration is executed on a basis metal whose material and shape are the same as those of the sample. b) A probe is allowed to abu
29、t against the measuring part of a test piece (within a range of about 8 mm diameter), the scale is read, and the procedure is repeated five or more times. Note (4) In the case where the measurement is executed continuously the cali- bration is carried out appropriately midway. Copyright Japanese Sta
30、ndards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:39:25 MSTNo reproduction or networking permitted without license from IHS -,-,- STDeJIS H BbBO-Z-ENGL 1998 4933b08 0565063 T3T 3 H 8680-2 : 1998 Remarks : In th
31、e case where the standard sheet for calibration and the test piece are different in material, the relation to the actual coating thickness shall be previously examined by the microscopical method, and corrected. 9 Expression of test results For the test result, round off the average of five or more
32、measured values (pm) in accordance with JIS Z 8401, and represent it by the numerical value to the first decimal place. This numerical value corresponds to the coating thickness at the measuring point specified in JIS H 8601. L * Copyright Japanese Standards Association Provided by IHS under license
33、 with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:39:25 MSTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS H BbBO-Z-ENGL L998 W 4933b08 05b5062 976 4 H 8680-2 : 1998 Annex (informative) Specification for coating thickness stand
34、ard sheet This Annex gives examples of the specification for coating thickness standard sheet, and does not constitute a part of this Standard. 1 Scope This Annex is applied to the specification for coating thickness standard sheet. 2 Coating thickness standard sheet The coating thickness standard s
35、heet shall be as follows. a) Standard sheet for control Basis metal: The basis metal material is A1050P(1). Standard dimensions and shape: Standard dimensions are 40 mm x 40 mm with 1.5 mm to 2.0 mm in thickness, and the surface roughness is 0.1 Ra or under. Coating thickness: The coating thickness
36、is selected according to the calibra- tion method for a measuring instrument and the coating thickness of an object to be measured. Coating thicknesses at several positions where come in con- tact with the standard sheet for control is measured by the microscopical method, and the average is taken a
37、s the in- dicated value, and the difference between the maximum value and the minimum value of each measured value are clearly stated. Note (1) A standard sheet for control made of another ma- terial (which chemical synthesis of homogeneous coating is possible) may be separately manufac- tured. Indi
38、cated value: b) Standard sheet for calibration (anodic oxide coating) Basis metal: The material is the same as that of the product, and the thickness is 0.8 mm or over. Coating thickness: The coating thickness is selected according to the calibra- tion method for the measuring instrument and the coa
39、ting thickness of an object to be measured. An indicated value is determined according to the follow- ing procedure. 1) For the prepared standard sheet for calibration, the coating thickness of the central part is measured using the eddy current measuring instrument calibrated by the standard sheet
40、for control or the standard sheet for calibration. Indicated value: Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:39:25 MSTNo reproduction or networking permitted without license from
41、IHS -,-,- 5. H 8680-2 : 1998 2) 3) 4) One sheet from the standard sheets for calibration of the same lot measured in i) is extracted at random, and the coating thickness of the central part is measured by the microscopical method. The corrected value is obtained from comparison of the value measured
42、 by the eddy current method of i) and the value measured by the microscopical method of 2). The indicated value is obtained by correcting the mea- sured values of a series of standard sheets for calibration obtained in i) by the corrected value obtained in 3 ) . c) Standard sheet for calibration (pl
43、astic film) Basis metal: Standard dimensions: Thickness of film: Indicated value: The basis metal is a plastic film which is comparatively excellent in durability and has a uniform thickness of polyester, Tetron, etc. The standard dimensions are about 40 mm x 40 mm, and the matters related to the ef
44、fective part are indicated or described. The film thickness is selected according to the calibra- tion method for the measuring instrument and the coating thickness of an object to be measured. For the indicated value, the thickness of a film is mea- sured at least five times by the eddy current mea
45、suring instrument calibrated using the standard sheet for con- trol or the micrometer of 0.1 pm in minimum indication, and its average is adopted. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10
46、/2007 23:39:25 MSTNo reproduction or networking permitted without license from IHS -,-,- - 7 STDwJIS H BbBO-2-ENGL L998 4933608 05b5064 749 L . Errata for nS (English edition) are printed in Srundurdizution Jouml, published monthly by the Japanese Standards Association, and also provided to subscrib
47、ers of JIS (English edition) in Monthly Informution. Errata will be provided upon request, please contact: Standardization Promotion Department, Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN TEL. 03-3583-8002 FAX. 03-3583-0462 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 23:39:25 MSTNo reproduction or networking permitted without license from IHS -,-,-