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1、JAPANESE I N DUSTR IAL STANDARD Translated and Published by Ja pa nese Stand a rds Associ ation Methods of test for hot dip galvanized coatings ICs 25.220.40 Descriptors : testing, metal coatings, zinc, non-ferrous metals, hot-dip coating, iron, Reference number : JIS H 0401 : 1999 (E) transition me
2、tals, steels, hot-dip galvanizing, electroplating 9s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:59:24 MDTNo reproduction or networking permitted without license from IHS -,-,- STD=J
3、IS H 0401-ENGL 1997 4933b08 05b3920 870 H 0401 : 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 Japanese Industrial Standards Committee in accordance with the Industr
4、ial Standardization Law. Consequently JIS H 0401 : 1983 is replaced with JIS H 0401 : 1999. In this revision, the conformity with normative references and the cor- responding International Standard and the revision of the structure in accordance with JIS Z 8301 : 1996 are mainly executed. Date of Es
5、tablishment: 1950-12-20 Date of Revision: 1999-09-20 Date of Public Notice in Official Gazette: 1999-09-20 Investigated by: Japanese Industrial Standards Committee Divisional Council on Non-ferrous Metals JIC H 0401 : 1999, First English edition published in 2000-06 Translated and published by: Japa
6、nese 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 authority. 0 JSA2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in a
7、ny form or by any means, electronic or mechanical, including photocopying 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 Resa
8、le, 03/14/2007 19:59:24 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS H 0401-ENGL LVV 4933608 0563921 707 JIS H 0401 : 1999 JAPANESE INDUSTRIAL STANDARD Methods of test for hot dip galvanized coatings Introduction This Japanese Industrial Standard has been prepare
9、d based on IS0 1459 Metallic coatings-Protection against corrosion by hot dip galvanizing-Guid- ing principles, IS0 1460 Metallic coatings-Hot dip galvanized coatings on ferrous metals-Determination of the mass per unit area-Gravimetric method and IS0 1461 Metallic coatings-Hot dip galvanized coatin
10、gs on fabricated ferrous products-Re- quirements, published in 1973 as the first edition, in such a manner that the parts (shape and dimension) in the corresponding International Standard are contained without modifying the technical contents and the items not specified in the corre- sponding Intern
11、ational Standard are complementarily provided as a part of the Japanese Industrial Standard. The portion with sidelines or dotted underlines in this Standard are the matters not specified in the corresponding International Standard. 9 1 Scope This Japanese Industrial Standard specifies the methods o
12、f test for hot dip galvanized coatings (hereafter referred to as “coating“) executed on iron and steel products. This Standard may be applicable to the electrolytic zinc-coating in place of the hot dip galvanized coating. Remarks : The International Standards corresponding to this Standard are as fo
13、llows. IS0 1459-1973 Metallic coatings-Protection against corrosion by hot dip galvanizing-Guiding principles IS0 1460-1992 Metallic coatings-Hot dip galvanized coatings on ferrous materials-Gravimetric determination of the mass per unit area IS0 1461-1973 Metallic coatings-Hot dip galvanized coatin
14、gs on fabricated ferrous products-Requirements 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 indicated below shall be applied. JIS B 7729 JIS G 3442 JIS K
15、1202 JIS K 1310 JIS K 1431 JIS K 1433 JIS K 8400 JIS K 8407 JIS K 8422 Erichsen cupping testers Galvanized steel pipes for ordinary piping Solid caustic soda Hydrochloric acid Potassium hydroxide Copper sulfate for industrial use Antimony (III) chloride Antimony (III) oxide Copper (II) oxide Copyrig
16、ht Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:59:24 MDTNo reproduction or networking permitted without license from IHS -,-,- STD*JIS H 040L-ENGL 4933608 0563922 643 = 2 H 0401 : 1999 JIS K 8
17、847 Hexamethylenetetramine JIS Z 2247 Method of Erichsen cupping test 3 General matters 3.1 Relation to product standard Classification of test methods applied to metallic coated iron and steel products, sampling method of test specimen, acceptability cri- teria of test and retest are specified in t
18、he respective product standards. b) Steel sheets Hot dip galvanized iron sheets and others c) Wires Iron wire, steel wire, wire rope, iron strand wire, steel strand wire, wire netting, barbed wire, wire cylinder, armored wire, core wire for steel core alu- minum strand wire and others d) Rolled stee
19、ls Rolled steels such as steel sheet, section, flat bar, steel bar and others e) Prefabricated steel products Prefabricated steel products such as iron tower, bridge, steel frame, metal fittings for shipbuilding, live hardware, tank and others f) Bolts and nuts Various kinds of bolts and nuts, cotte
20、rs, washers and others g) Castings and forgings Iron casting, steel forging, steel casting, pipe joint (including that made of steel pipe), metal fittings for porcelain insulator and others 3.3 Classification of test methods The test methods shall be classified into four types as shown in Table 1 an
21、d application of each test method shall be in accordance with the respective product standards. . Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:59:24 MDTNo reproduction or networking p
22、ermitted without license from IHS -,-,- STDmJIS H 0401-ENGL 1999 = 4733608 05b3723 58“ 3 H 0401 : 1999 - 4.1 - 4.1 4.1 _._ ._._ . 5 4.2 - 5 4.2 5 4.2 5 4.2 4.2 ._. _ _ _ b * - - 6.4 - Table 1 Classification of Test Methods - - 6.5 _ Classification of iron and steel products Bolts and nuts Castings a
23、nd forgings Pipes Steel sheets Wires Rolled steels Prefabricated steel products ._ _ 4 is filtered and conditioned at 18 “C to take the solution of 1.186 to 1.188 g/cm3 in ensity as the test solution. . 3 1 1 i.4 Amount of test solution For pipes, rolled steels, prefabricated steel products, bolts a
24、nd nuts, and castings and forgings Not less than 6 ml test solution per cm2 of its surface area shall be used so that the test piece is completely dipped therein and the same solution may be used until the dipping number reaches 20 times. For wires A vessel not reacting with copper sulfate solution
25、such as a plastic vessel or the like having 50 mm min. in inner diameter for a wire having under 2 . 6 mm in diameter, or having 75 mm min. in inner diameter for a wire having 2.6 mm min. in diameter shall be used and the depth of the solution shall be 100 mm min. This amount can be used for 8 test
26、pieces maximum. In the test for exceed- ing 8 test pieces, its test solution shall be exchanged. Cleaning of test piece As in 4.2.3. i.5 Operation A cleaned test piece shall be quietly dipped into the center of the ,est solution kept at 16 to 20 “C for 1 min. At that time, the solution shall not be
27、nixed or the wall of the vessel shall not be touched. The test piece taken-out shall be washed immediately in water and the copper tdhered to the coating surface is wiped off with a brush or the like. This operation shall be repeated. 5.6 Judgment of end point 5.6.1 Where becoming end point Where br
28、illiant adherent metallic copper is ieposited on the substrate of the coating. 1.6.2 Where not becoming end point s) Where not corresponding to 5.6.1. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 0
29、3/14/2007 19:59:24 MDTNo reproduction or networking permitted without license from IHS -,-,- STDmJIS H 0401-ENGL 1999 W 4733608 05b3730 7LT 10 H 0401 : 1999 4) The case where the brilliant metallic copper is deposited on the cut and scratched parts generated after the coating and the part adjacent t
30、hereto. Remarks: Supplementary test When there is any question as to the presencelabsence of a coating layer under adherent metallic copper for various steel products, the adherent metallic copper is scraped off and one drop or several drops of dilute hydro- chloric acid are dripped on this position
31、. When there is some coating layer, the judgment can be made according to the ac- tive generation of hydrogen gas. I 5.7 Acceptability judgment The case where the operation of 5.5 is carried out by specified times only and the end point is not reached, shall be acceptable. Notes (3) When the concent
32、ration of the copper sulfate solution is remarkably reduced due to the excessively large dimension of the uncoated sur- face area, this part shall be coated with a suitable coating material. (4) The amount of cupric hydroxide is about 10 g per 10 I of the solu- tion. It is determined by the precipit
33、ation at the bottom of the ves- sel that the excessive amount of the cupric hydroxides exists. (5) About 8 g of copper (II) oxide specified in JIS K 8422 in place of cupric hydroxide per 10 1 of the solution may be used. In this case, it shall be left for 48 h. Otherwise, about 12 g of powder basic
34、copper carbonate CUCOS- Cu(OH)21 (pure for chemistry) per 10 I of the solution may be used. In this case, it shall be left for 24 h. 6 Methods for adhesion test 6.1 Method by visual observation The presence of cracks or exfoliation of the coating layer due to the ordinary handling shall be examined.
35、 6.2 Bending test When bent by a specified angle with an inner side radius of specified times the diameter or thickness of the test piece, the surface condition of the coating layer such as the bent part or welded part shall be examined. 6.3 Erichsen test The Erichsen test shall be carried out by us
36、ing an Erichsen tester specified in JIS B 7729 according to the method for Erichsen test specified in JIS 2 2247, as appropriate, and the surface condition of the coating layer shall be examined. 6.4 Winding test When wound closely around a circular cylinder having a speci- fied diameter by specifie
37、d times, the surface condition of the coating layer shall be examined. 6.5 of the coating layer shall be examined. 6.5.1 Apparatus for hammer test The apparatus for the hammer test is given in Fig. 5. Hammer test When a blow is struck with a hammer, the surface condition c Copyright Japanese Standar
38、ds Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:59:24 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 STD-JIS H 040L-ENGL 1999 - 4933b08 05b393L b5b 11 H 0401 : 1999 .5.2 Setting of te
39、st piece The test piece shall be horizontally fixed so as not to e moved easily with a blow of a hammer, and the test surface shall be perpendicu- ir to the hammer. . 5 . 3 Test piece The test piece shall be 8 mm min. in thickness, and the surface I be tested shall be flat. 5.4 Operation The test su
40、rface shall be put horizontally and the hammer shall e naturally fallen from the position where its arm is vertical centering the support sble. Blows shall be applied to 5 parallel positions at 4 mm intervals and the ex- iliation and embossment between their traces shall be examined. The area within
41、 O mm from the corner or end shall not be tested. Further, each position shall be !truck only once. Unit: mm Oak of about 70 g i n mass Head mass 213 * 3 g Hammer edge hardness (Shore hardness) 40 min. Fig. 5 Apparatus for hammer test 7 Method for properties test (6) (alkali solubility test) 7 . 1 i
42、ts shape and dimensions shall conform to Table 2. Test piece The test piece shall be taken in accordance with 4.2.1 a) i) an1 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:59:24 MDTNo
43、reproduction or networking permitted without license from IHS -,-,- 12 H 0401 : 1999 Designation of pipe A 10 15 B 3/s % Length of test piece (mm) 30 30 Shape of section Whole Whole circle circle 20 25 32 40 % 1 1% 1% 30 30 30 30 Whole % circle /z circle /z circle circle Designation of pipe i I I I
44、I I I I A 50 65 80 90 100 125 B Length of test piece (mm) Shape of section 2 2% 3 3% 4 5 30 30 30 30 30 30 ?4 circle v4 circle VS circle VS circle /s circle % circle Designation of pipe 7.2 Test solution The test solution shall be prepared by a method wherein 20 g rolid caustic soda specified in JIS
45、 K 1202 or 28 g potassium hydroxide specified in JIS K 1431 is dissolved in 100 ml of water. A 150 175 200 225 250 300 B 6 7 8 9 10 12 7.3 Cleaning of test piece As in 4.2.3. Length of test piece (mm) Shape of section 7.4 Operation “he amount of the test solution shall be 5 ml min. per cm2 of coatin
46、g irea, which can completely dip the test piece, and a temperature of the test solution ;hall be kept at 75 to 80 “C. When the test piece is thrown in, the coating layer dissolves as time passes. Though Inly a little amount of bubbles is generated while the zinc layer on surface dissolves, iydrogen
47、gas is vigorously generated when the alloy layer is exposed and the inside if a glass vessel becomes to be filled with bubbles. Thereafter, when the iron sur- ace is exposed, the reaction becomes slow and the generation of bubbles disappears. b e time passed since the test piece has been thrown in s
48、hall be measured recogniz- ng that time as the end point. Further, the cross section of the test piece may be protected with a suitable coat- ng material so that the iron substrate is not directly into contact with the test so- ution. 30 30 30 30 30 30 % circle % circle % circle /s circle /s circle % circle 1.5 rom throwing-in of the test piece to the end point is not less than 100 min. Acceptability judgment The test shall be preferably accepted if the time Note (6) The properties test herein applies to JIS G 3442. Copyright Japanese Standards Association Provided by IHS