3- ksd8308-zinc hot dip galvanizings

KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS

KS D 8308

㉿ Zinc hot dip galvanizings

KS D 8308:2001(2011 confirmed)

Translated and Published by Korean Standards Association

http:// www. kssn.net

○C KSA 2011 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 and microfilm, without permission in writing from the publisher

Translation without guarantee In the event of any doubt arising, the original standard in

korean is to be evidence

2012-04-30, (주)케이투이엔지에 라이센스를 부여하며 불법 복사 및 무단 배포를 금합니다.

KOREAN INDUSTRIAL STANDARD

KS D 8308:2001 (2011 confirmed)

㉿ Zinc hot dip galvanizings

Introduction This Korean Standard has been modified based on KS A 0001 and been prepared by adding corresponding International Standard to normative references.

1 Scope This Korean Standard specifies the significant surface(1) of hot-dipped zinc galvanizing (hereinafter referred to as the “coating”) applied on iron and steel articles except zinc steel sheets and zinc-galvanized iron ⋅ steel wires for the purpose of corrosion proof. Remark (1) The significant surface means the important surface in practical use.

2 Normative references The following referenced documents contain provision which, through reference in this text, constitute provisions of this standard. These normative references apply the latest version. KS D 0201, Testing methods for hot-dipped zinc coating ISO 1460, Metallic coatings－Hot dip galvanized coating on ferrous materials－Gravimetric determination of the mass per unit area ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles－Specification and test method 3 Classification The classification of coating shall be as given in Table 1 according to the coating mass and number of copper sulfate tests.

Table 1 ― Classification

Classification Symbol A HDZ A Class 1 B HDZ B 35 HDZ 35 40 HDZ 40 45 HDZ 45 50 HDZ 50 55 HDZ 55

Class 2

61 HDZ 61


KS D 8308:2001

2

4 Quality 4.1 Appearance The coated surface shall be practically smooth and be free from uncoated surface or other detrimental defects. 4.2 Coating mass and copper sulfate test The coating mass and number of copper sulfate tests shall be in accordance with Table 2.

Table 2 ― Quality

Classification Symbol Coating mass (g/m2)

Number of copper sulfate

tests

Example of application (informative)

HDZ A － 4 times Steels, steel articles, steel pipes up to and incl. 5 mm in thickness, bolts and nuts 12 mm and over in diameter, and washers over 2.3 mm in thickness

Class 1

HDZ B － 5 times Steels, steel articles, steel pipes, and castings and forgings over 5 mm in thickness

HDZ 35 350 and over － Steels and steel articles with a range of 1 mm and over to up to and incl. 2 mm in thickness, bolts and nuts 12 mm and over in diameter, and washers over 2.3 mm in thickness

HDZ 40 400 and over － Steels, steel articles, castings and forgings with a range of over 2 mm to up to and incl. 3 mm in thickness

HDZ 45 450 and over － Steels, steel articles, castings and forgings with a range of over 3 mm up to and incl. 5 mm in thickness

HDZ 50 500 and over － Steels, steel articles, castings and forgings over 5 mm in thickness

HDZ 55 550 and over － Steels, steel articles, castings and forgings to be used under severe corrosion environment

Class 2

HDZ 61 610 and over － Steels, steel articles, castings and forgings 5 mm and over in thickness to be used under severe corrosion environment

Note 1 Class HDZ 55 coating shall be applied to base metals having 3.2 mm and over in thickness. When the thickness of the base metal is up to 3.2 mm, it shall be in accordance with the previous agreement between the purchaser and the supplier.

Note 2 The thickness and diameter denoted in the column “example of application” in the above table shall apply each nominal dimension.


KS D 8308:2001

3

4.3 Adhesion The coated film shall have good adhesion to the base metal and be able to withstand without stripping and cracking in normal use. 5 Test 5.1 Sampling Method of Test Piece The sampling method of test piece shall be conducted as follows: a) A representative specimen shall be taken from each lot consisting of products of the same material

that have been coated under the same conditions. A test piece shall be taken from the sampled specimen.

b) When it is practically impossible to cut off a test piece from an assembled product, a test specimen shall be taken from the same material as that used for the product. A test piece shall be made by coating the sampled specimen at the same time as the body.

c) The number of test piece and sampling plan thereof shall be in accordance with the agreement between the purchaser and the supplier.

5.2 Tests for Coating Mass It shall be in accordance with the test method for coating mass specified in KS D 0201. 5.3 Copper sulfate Test It shall be in accordance with the method of copper sulfate test specified in KS D 0201. 5.4 Adhesion Test It shall be in accordance with the method of adhesion test specified in KS D 0201. 6 Inspection The coating shall conform to the requirements specified in clause 4, when tested in accordance with clause 5. Test for coating mass, copper sulfate test, and adhesion test shall be performed by taking test pieces in accordance with sub-clause 5.1. Numbers of test pieces and sampling methods shall comply with the agreement between the purchaser and the supplier. 7 Marking For coated products, the following items shall be marked on the label or invoice (including statement of delivery). a) Symbol indicating the classification of coating b) Date of coating c) Manufacturer’s name or its abbreviation

－end－


Korean Standards Association http://www.ksa.or.kr

㉿ KS D 8308:2001

KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS

Zinc hot dip galvanizings ICS 25.220.30; 25.220.40


3- ksd8308-zinc hot dip galvanizings

Documents