ASTM-A239 2004

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A239-95(2004) Standard Practice for Locating the Thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles

Published By	Publication Date	Number of Pages
ASTM	2004	4

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Categories: 25.220.40 - Metallic coatings, ASTM

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Description

ASTM A239-95-Reapproved2004

Historical Standard: Standard Practice for Locating the Thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles

ASTM A239

Scope

1.1 This practice covers the procedure for locating, by the use of a solution of copper sulfate, the thinnest spot in a zinc coating (hot dipped, electroplated, or sprayed) on iron or steel articles that are coated after the shape is produced by casting, drawing, pressing, or other forming methods. Examples are: electrical metallic tubing and rigid conduit pipe, castings and forgings, and structural steel; on special hardware, such as poleline, builder’s, and farm implement hardware; bolts, nuts, screws, and other miscellaneous general hardware.

1.2 The use of this practice with zinc coating deposited through different processes (such as hot dipped, electroplated, or sprayed) requires caution in interpretation since the end point may vary considerably between different zinc-coating systems.

1.3 Excluded from this practice is sheet steel from hot-dip or electrocoating lines as the sheet products are normally subject to additional forming after the coating process. Also excluded from this practice are all zinc-coated wire and wire products either continuously or batch coated before or after forming. Warning—Past research (dating from around 1963) has indicated that this practice can be influenced by operator technique. Variations can be due to the difference in hand pressure used to wipe the sample or the inability of the operator to recognize the end point.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

bolts; electroplated; hardware; hot dipped; nuts; screws; thinnest spot; zinc coating thickness

ICS Code

ICS Number Code 25.220.40 (Metallic coatings)

DOI: 10.1520/A0239-95R04

PDF Catalog

PDF Pages	PDF Title
1	Scope Significance and Use Copper Sulfate Solution
2	Specimen Rinse Water Quantity of Copper Sulfate Solution Preparation of Specimens Procedure End Point Supplementary Tests Supplementary Test for All Types of Zinc Coatings
3	Keywords X1. APPLICATION OF THIS PRACTICE TO WEATHERED GALVANIZED WARE X1.1 X2. STANDARD FOR COMPARISON X2.1 X3. ACTION OF COPPER SULFATE SOLUTION ON ZINC COATINGS X3.1 X3.2

Additional information

Standard Title	A239-95(2004) Standard Practice for Locating the Thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles
Published Code	ASTM
Publication Date	2004
Pages Count	4
ICS Codes	25.220.40 - Metallic coatings