Practical Guidelines for the Inspection and Repair of Hot Dip Galvanized Coatings

Information courtesy of: HOT DIP GALVANIZERS ASSOCIATION SOUTHERN AFRICA

Foreword

"Practical Guidelines for the Inspection and Repair of Hot Dip Galvanized Coatings", has been compiled with reference to the new international specifications. These include:

ISO 1461:1999 Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods.

EN 10240:1999 Internal and/or external protective coatings for steel tubes - Specification for hot dip galvanized coatings applied in automatic plants.

ISO 14713:1999 Protection against corrosion of iron and steel in structures - Zinc and aluminium coatings - Guidelines.

Although specifications SABS 763 and SABS 0214 have been replaced, for practical reasons reference has also been made to:

SABS 763:1997 Hot-dip (galvanized) zinc coatings (other than on continuously zinc coated sheet and wire).

The guidelines take into account recognised engineering principles, inspection practices and practical experience accumulated over the years by the Hot Dip Galvanizers Association of Southern Africa established in 1965.

The guidelines have been formulated for general information only and although practically enforceable, they are not intended as a substitute for competent professional examination and verification as to accuracy, suitability and/or applicability, by a trained HDGASA inspector.

The publication of the material contained in this booklet is not intended as a representation or warranty on the part of the Hot Dip Galvanizers Association of Southern Africa.

Anyone making use of this information assumes all liability arising from such use.

In South Africa, the South African Bureau of Standards (SABS) has adapted ISO 1461:1999, EN 10240:1999 and ISO 14713. The specifications are therefore published by the SABS as SABS ISO 1461:1999, SABS EN 10240:1999 and SABS ISO 14713:1999.

Due to frequent misrepresentation and incorrect specifying of other coatings such as "cold galv." and "electrogalv." which no doubt fulfil a requirement in the market, the specifier, who requires hot dip galvanizing for corrosion protection reasons, should specify that all components be hot dip galvanized to ISO 1461 or EN 10240 as applicable.