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1、STDmJIS H 8610-ENGL 1999 4933608 0567323 753 JIS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Electroplated coatings of zinc on iron or steel ICs 25.220.40 Descriptors : metal coatings, coatings, electroplating, zinc, iron, steels, metal plating, Reference
2、number : JIS H 8610 : 1999 (E) corrosion protection 6 s H 8610 : 1999 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deliberations at the Japanese Industrial Standards Committee in accorda
3、nce with the Industrial Standardization Law. Consequently JIS H 8610:1991 is replaced with JIS H 8610:1999. Attention is drawn to the possibility that some parts of this Standard may conflict with a patent right, application.for a patent after opening to the public, utility model right or applicatio
4、n for registration of utility model after opening to the public which have technical properties. The relevant Minister and the Japanese Industrial Standards Committee are not responsible for identifying the patent right, application for a patent after opening to the public, utility model right or ap
5、plication for registration of utility model after opening to the public which have the said technical properties. Date of Establishment: 1956-04-18 Date of Revision: 1999-08-20 Date of Public Notice in Official Gazette: 1999-08-20 Investigated by: Japanese Industrial Standards Committee Divisional C
6、ouncil on Non-Ferrous Metals JIS H 8610: 1999, First English edition published i n 2000-11 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, 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 authorit
7、y. Q JSA 2000 A 1 1 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 and microfilm, without permission in writing from the publisher. Printed in Japan STD-JIS H BbLO-EN
8、GL 1999 m 4933bO 05b7325 52b JAPANESE INDUSTRIAL STANDARD JIS H 8610 : 1999 Electroplated coatings of zinc on iron or steel Introduction “his Japanese Industrial Standard has been prepared based on the corresponding International Standard, which is listed in Remarks of 1 Scope, without any modificat
9、ion of the technical contents on the corresponding parts, but some items, which are not specified in the corresponding International Standard, are supplemented in this Japanese Industrial Standard. 1 Scope This Japanese Industrial Standard specifies electroplated coatings (hereafter referred to as “
10、coating“) of zinc on the significant surface of iron or steel basis metal for the purpose of preventing corrosion. Remarks: The International Standard corresponding to this Standard is as follows. IS0 2081 1986 Metallic coatings - Electroplated coatings of zinc on iron or steel Informative reference
11、: When chromate conversion coatings are applied for the purpose of preventing corrosion, the procedures shall conform to JIS H 8625. 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent ed
12、itions of the standards indicated below shall be applied. JIS H 0400 Glossary of terms used in electroplating JIS H 0404 Graphical symbol for electroplated coating JIS H 8501 Methods of thickness test for metallic coatings JIS H 8504 Methods of adhesiopt test for metallic coatings JIS H 8625 Chromat
13、e conversion coatings on electroplated zinc and cadmium coatings JIS Z 9031 Random sampling methods 3 apply, and the rest of the terms are as follows. Definitions For the purpose of this Standard, the definitions in JIS H 0400 a) b) c) significant surface The surface of the parts which is plated or
14、to be plated and for which the coating is essential for performance and appearance. local thickness The average of measurements carried out specified times on the reference area. minimum local thickness The minimum value of local thicknesses which have been confirmed on the significant surface of th
15、e part. 4 Grade, symbols and service environment 4.1 Grade and symbols STD-JIS H 6610-ENGL 1777 4733b08 0567326 4b2 = Informative reference I Grade Minimum thickness of coating 2 H 8610 : 1999 Condition of service environment Ordinary indoor environment Indoor environment with high humidity Ordinary
16、 outdoor environment Outdoor environment with high corrosiveness a) Grade The grades of coatings shall be classified into 6 grades according to the minimum thickness of coating as shown in Table 1. b) Symbols The symbols used for coatings shall follow JIS H 0404. Symbols D C B A 4.2 Service environm
17、ent, condition of service environment, and symbol The service environment, condition of service environment, and symbol shall follow JI$ H 0404. Service condition number of IS0 1 Informative reference: When electroplated articles are used for corrosion prevention, the service environments shall be c
18、lassified as shown in Informative reference Table 1 and indicated with symbols. Example Residence, office, etc. Table 1 Grade and its minimum thickness of coating Unit: iIm Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 2 5 8 12 20 25 - 1 2 3 3 4 Informative reference Table 1 Service environment, c
19、ondition of service environment, and symbols Service environ- ment D C B A 2 Bath room, kitchen, etc. Field, residence area, etc. Beach, industrial area, etc. , 5 Quality 5.1 Appearance of coatings When being tested according to 9.2, the significant surface of coating shall be free from such defects
20、 as roughness, burnt deposits, cracks, pits, exposures of basis metal, and from such signs of inferior adhesiveness as blisters and peeling, and stains, flaws, or others. STD-JIS H BbLO-ENGL 1999 4733608 05b7327 3T7 9 . 3 H 8610 : 1999 Remarks 1 If the degree of appearance is specified, the degree s
21、hall conform to the agreement between the parties concerned with delivery. 2 If a contact mark for electric current is unavoidable on the significant surface, its position shall be the subject of agreement between the parties concerned with delivery. 6.2 The minimum thickness of coating when being t
22、ested according to 9 . 3 , shall conform to the requirements in Table 1. The minimum thickness of coating, Informative reference: When there is no specification on the significant surface, the surface area on which a ball of 20 mm in diameter does not touch shall not be regarded as the significant s
23、urface. In the case of the product whose significant surface is less than 100 mm2, the minimum thickness shall be the lowest value of the average thicknesses, and for the product having 100 mm2 or larger significant surface, the minimum thickness be the lowest value of local thicknesses. 5.3 Adhesiv
24、eness of coating according to 9.4, there shall be no peeling or blister on the coating. When the adhesiveness of coating is tested 5.4 Application of chemical conversion coating The application of chemical conversion coating shall follow the agreement between the parties concerned with delivery. Rem
25、arks 1 Chromate conversion coatings among the chemical conversion coatings can improve the corrosion resistance of zinc coatings. The grades and typee of chromate conversion coatings to be applied to zinc coatings shall follow JIS H 8625. 2 At the specific request of the purchaser, chromate treatmen
26、t may be omitted or replaced with other conversion coatings. 6 Basis metal The condition of basis metal prior to plating gives serious influences on the quality of coatings. Especially, when the basis material is supplied from the purchaser, the purchaser must indicate the information concerning the
27、 basis material on the process specification or others. 7 Stress relief before electroplating When stress relief before electroplating is required for the basis metal of iron or steel, the conditions required shall follow the agreement between the parties concerned with delivery. The conditions of t
28、hermal treatment for stress relief before electroplating, which are stated in the corresponding International Standard as an Informative reference, are shown in Annex 1 (informative). 8 Hydrogen embrittlement relief after electroplating When hydrogen embrittlement relief after electroplating is requ
29、ired for the electroplating on the basis metal of iron or steel, the hydrogen embrittlement relief shall be carried out by thermal treatment within 4 hours after electroplating. The conditions of thermal treatment shall follow the agreement between the parties concerned with delivery. -,-,- 4 H 8610
30、 : 1999 The conditions of thermal treatment for hydrogen embrittlement relief after electroplating, which are stated in the corresponding International Standard as an Informative reference, are shown in Annex 2 (informative). 9 Tests 9.1 Preparation of test piece Generally, test pieces are prepared
31、from products. If it is impossible to use the product itself as a test piece, a substitute test piece can be used for the test. The substitute test piece must be prepared adopting the same basis material and under the same condition as those used when the products were manufactured as far as possibl
32、e. 9.2 Appearance test Carry out the appearance test with naked eyes, and check the existence of defects on the coating such as roughness, burnt deposits, cracks, pits, exposure of basis metal, and signs of poor adhesiveness, stains, flaws or others. 9.3 Thickness test Thickness test shall be carrie
33、d out by any one of, a microscopic sectional thickness test, electromagnetic thickness test, coulometric thickness test, fluorescent X-ray thickness test, beta back-scatter thickness test, profilometer thickness test by micrometer methods, and mass weighing thickness test by coating fracture of plat
34、ed amount test methods, which are specified in JIS H 8501. 9.4 Adhesion test Adhesion test shall conform to the test method specified in JIS H 8604. 10 Inspection The inspection shall be carried out as follows. a) Coatings shall be tested according to 9, and those, which have met the requirements gi
35、ven in 5, shall be judged to be acceptable. b) Test pieces shall be taken out from the lot composed of the same products in accordance with JIS Z 9031. Remarks 1 The selection of inspection items and testing method shall follow the agreement between the parties concerned with delivery. 2 The number
36、of test pieces, the order of inspections, the spots to be inspected, and employing of substitute test piece, shall follow the agreement between the parties concerned with delivery. 11 Designation of electroplated coating The electroplated coatings shall be designated in accordance with JIS H 0404. E
37、xample 1 On basis metal of steel, electroplated zinc coating with 20 p m EpFe/Zn 20 I II I I I II I II I II I II I I, I t, I II * II I II 8- - - - - - - Symbol expressing the minimum thickness (20 pm) of coating I II * _-_-_-_ Symbol expressing the kind (electroplated zinc) of coating ;c -. Symbol e
38、xpressing the kind (steel basis metal) of basis metal .-_-_-_ Symbol expressing the electroplated coating II II Il o , STDOJIS H BbLO-ENGL 1999 4933608 0567329 L7L 5 H 8610 : 1999 Example 2 On basis metal of steel, electroplated zinc coating o EpFdZn 31 a grade 3 I II I I I, I II I II I II I I, I- -
39、 - - - -. Symbol expressing the grade (grade 3) of coating I II IL - Symbol expressing the kind (electroplated zinc) of coating II II I IL -_-_-_. I Symbol expressing the kind (steel basis metal) of basis metal I_-_-_-. Symbol expressing the electroplated coating 12 note. Marking The following parti
40、culars shall be marked on the invoice or delivery a) Symbols for coatings b) Year, month, and day of processing c) Name of processor d) Test results of coating quality stated on the ordering note or process specification 13 Items to be stated on ordering note or process specification The purchaser m
41、ust state the following items on the ordering note or process specification. Additional items, however, shall be omitted according to the agreement between the parties concerned with delivery. a) Basic items i) 2) Symbols for coatings 3) Significant surface of coating Properties, conditions and fini
42、sh of basis material Informative reference: It is preferable to indicate them on the drawing or to present an actual sample with marking on it. 4) Appearance of coatings Informative reference: It is preferable to submit a boundary sample. 5) Type, size, range, or location of allowable defects on the
43、 coating surface 6) Kind of chromate conversion coating or other chemical conversion coatings 7) Method for inspection (for instance, the method for adhesion test) b) Additional items 1) Required thermal treatment 2) Required quality of coating and its test method 3) Necessary conditions of special
44、packaging for electroplated articles 4) Other special pre- or post-treatment and limitation -,-,- STD-JIS H 8610-ENGL 1999 9 4933b08 05b7330 993 Duration - Y I 6 H 8610 : 1999 Annex 1 (informative) Conditions for thermal treatment to relieve stress before electroplating 1 Scope This Annex gives gene
45、ral thermal treatment conditions for stress relief, which is to be carried out on iron or steel basis metal, before electroplating for information. 2 Thermal treatment condition Apply the thermal treatment under the conditions shown in Annex 1 Table 1 as required. Informative reference: If the hardn
46、ess decreasing of surface hardened steel remains in a permissible range, the thermal treatment at 130 to 150 “C for 5 hours or longer may be allowed. Annex 1 Table 1 Thermal treatment conditions for stress relief before electroplating Tensile strength MPa Up to 1050 1051 to 1450 1451 to 1800 Over 18
47、00 Temperature C - 190 to 220 190 to 220 190 to 220 24 l8 I 8 -,-,- STD-JIS H BbLO-ENGL 1999 4933b08 0567333 82T Up to 1050 1051 to 1450 1451 to 1800 7. H 8610 : 1999 - - 190 to 220 190 to 220 8 or more 18 or more Annex 2 (informative) Conditions for thermal treatment to relieve hydrogen embrittleme
48、nt after electroplating Over 1800 1 embrittlement relief after electroplating for information. Scope This Annex gives general thermal treatment conditions for hydrogen 190 to 220 24 or more 2 Thermal treatment condition Apply the thermal treatment under the conditions shown in Annex 2 Table 1 as req
49、uired. Informative reference: In the case of surface hardened steel, the thermal treatment at 190 to 220 O C for 2 hours or longer may be allowed. Annex 2 Table 1 Thermal treatment conditions for hydrogen embrittlement relief after electroplating Tensile strength Duration MPa STD*JIS H BbLO-ENGL L997 4733608 05b733Z 766 Errata for JIS (English edition) are printed in Standardizari