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ASTM - A780/A780M

Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

active, Most Current
Organization: ASTM
Publication Date: 1 September 2020
Status: active
Page Count: 4
ICS Code (Metallic coatings): 25.220.40
scope:

This practice describes methods that may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip galvanizing, and uncoated areas remaining after initial hot-dip galvanizing. The damage may be the result of welding or cutting (flame), in which case the coating will be damaged predominantly by burning. This practice can also be used to repair hot-dip galvanized coatings damaged by excessively rough handling during shipping or erection. Requirements concerning the renovation of uncoated areas remaining after initial hot-dip galvanizing are contained within the applicable material specification.

This practice describes the use of low melting point zinc alloy repair rods or powders made specifically for this purpose, the use of paints containing zinc dust, and the use of sprayed zinc (metallizing).

The extent of repair shall be limited to an area mutually agreeable to the contracting parties. Similarly, contracting parties shall agree to the repair method to be used.

Units-

This specification is applicable to orders in either inch-pound units (as A780) or in SI units (as A780M). Inch-pound units and SI units are not necessarily exact equivalents. Within the text of this specification and where appropriate, SI units are shown in brackets. Each system shall be used independently of the other without combining values in any way.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Document History

A780/A780M
September 1, 2020
Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
This practice describes methods that may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip galvanizing, and uncoated...
May 1, 2009
Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
This practice describes methods that may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip galvanizing, and uncoated...
May 1, 2009
Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
This practice describes methods that may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip galvanizing, and uncoated...
April 10, 2001
Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
This practice describes methods that may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip galvanizing, and uncoated...
April 10, 2001
Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
1. Scope 1.1 This practice describes methods which may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip...
June 10, 2000
Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
This practice describes methods which may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip galvanizing, and...
September 15, 1993
Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
1. Scope 1.1 This practice describes methods which may be used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other products fabricated prior to hot-dip...
February 15, 1993
STANDARD PRACTICE FOR REPAIR OF DAMAGED AND UNCOATED AREAS OF HOT-DIP GALVANIZED COATINGS
A description is not available for this item.
August 15, 1992
STANDARD PRACTICE FOR REPAIR OF DAMAGED AND UNCOATED AREAS OF HOT-DIP GALVANIZED COATINGS
A description is not available for this item.
March 30, 1990
STANDARD PRACTICE FOR REPAIR OF DAMAGED AND UNCOATED AREAS OF HOT-DIP GALVANIZED COATINGS
A description is not available for this item.
September 29, 1980
STANDARD PRACTICE FOR REPAIR OF DAMAGED HOT-DIP GALVANIZED COATINGS (R 1987)
A description is not available for this item.

References

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