Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
Rapid Communication Note
Study of Stress Corrosion Cracking Test Method for Pure Copper Tube in Ammoniacal Environment
Masahiro SakaiMitsuki KiyaTomoyoshi IrieHiroshi Yakuwa
Author information

2016 Volume 65 Issue 4 Pages 138-142


A simple test method is proposed for reproducing stress corrosion cracking of pure copper in ammoniacal environment. A test tube of ammonia aqueous solution and C-ring specimens sampled from a pure copper tube were put in a 500mL polypropylene bottle for three weeks under room temperature. The pure copper tubes used in this work were high phosphorous deoxidized copper tube containing 0.028% P, low phosphorous deoxidized copper tube containing 0.007% P and oxygen-free copper tube without P. Tempers of these tubes were H, 1/2H and O defined in JIS H0500. Intergranular corrosion or intergranular cracking was occurred on the surface of P-deoxidized 1/2H and O copper tubes under gas-phase ammonia derived from 1 to 9% ammonia water, while intergranular corrosion was not observed in the oxygen-free copper and all H-tempered copper tubes. It was found that no stress corrosion cracking occurs in the pure copper tubes without phosphorous or with small crystal grains by work hardening.

Information related to the author
© 2016 Japan Society of Corrosion Engineering
Previous article Next article