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    ASTM A780/A780M-20

    Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
    • 발행일 : 2020-09-01
    • 발행기관 : ASTM
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분야 01.06 : 피복 철강 제품
적용범위

1.1 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.

1.2 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).

1.3 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.

1.4 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.

1.5 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.

1.6 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.
국제분류(ICS)코드 25.220.40 : 금속 도장
페이지수 4
Edition 20

이력정보

No. 표준번호 표준명 발행일 상태
1 ASTM A780/A780M-20상세보기 Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings 2020-09-01 표준
2 ASTM A780/A780M-20 REDLINE상세보기 Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings 2020-09-01 표준
3 ASTM A780/A780M-09(2015)상세보기 Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings 2015-05-01 구판
4 ASTM A780/A780M-09상세보기 Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings 2009-05-01 구판

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