의미와 용도
5.1 테스트 방법은 원래 연구 개발 목적으로 개발되었습니다.; 하지만, 특정 재료 사양에서, it is referenced to evaluate production materials (see section 14 on accuracy and deviation).

5.2 Using this test method can effectively predict the spalling corrosion behavior of these alloys in various types of outdoor services, especially in Marine and industrial environments. The four-test solution is highly corrosive and represents a more stringent type of environmental service, and certainly does not include unusual chemicals that are unlikely to be encountered in the natural environment.

5.3 Exfoliation grades were chosen arbitrarily in this test to illustrate the wide range of resistance to exfoliation. 하지만, it remains to be determined whether a correlation can be established between EXCO test ratings and the actual conditions of use for a given alloy. The Aluminium Alloy Peeling Corrosion Working Group (G01.05.02.08) is conducting an activity to conduct outdoor exposure testing for this purpose. 예를 들어, it has been reported that Al-Zn-Mg-Cu alloy samples rated EA or P in the 48-hour EXCO test did not experience more than a small amount of early peeling (EA) during six to nine years of exposure to the coastal atmosphere, while in most cases ED grade materials showed significant peeling within a year in the coastal atmosphere. It is expected that more comparisons will be provided as outdoor testing expands.

순환 습열 부식에 대한 ASTM G34-2020 테스트 방법

반지름
1.1 This test method covers a constant immersion exfoliation corrosion (EXCO) test procedure for high strength 2XXX and 7XXX series aluminum alloys.

메모 1: This test method was originally developed for research and development purposes; 하지만, 특정 재료 사양에서, it is referred to as applicable for evaluating production materials (see section 14, “Accuracy and Deviation”).

1.2 This test method is applicable to all forged products, such as sheets, 접시, extrusions and forgings produced by conventional ingot metallurgy processes.

1.3 The test method can be used on any form of sample or part that can be immersed in the test solution.

1.4 이 표준은 모든 안전 문제를 해결하기 위한 것이 아닙니다., 만약에 어떠한, 그 사용과 관련된. 적절한 안전을 확립하는 것은 이 표준 사용자의 책임입니다., 건강 및 환경 관행을 확인하고 사용 전 규제 제한의 적용 여부를 결정합니다..

1.5 이 국제 표준은 국제 표준 개발 원칙에 관한 결정에서 확립된 국제적으로 인정된 표준화 원칙을 기반으로 합니다., WTO 무역기술장벽위원회가 발행한 지침 및 권고사항.