ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Since the PbSCC(Lead stress corrosion cracking) of alloy 600 tubing materials wasreported by Copson and Dean in 1965, the effect of lead on a corrosion film and crackingmorphology have been continually debated. An electrochemical interaction of lead with thealloying elements of SG tubings was studied and the corrosion products were analyzed. It wasfound that lead enhanced the anodic dissolution of alloy 600 and alloy 690 in the electrochemicaltest. The lead preferentially dissolved the Cr from the corrosion film of alloy 600 and alloy 690 inalkaline water. The lead ion seemed to penetrate into the TG crack tip and react with the corrosionfilm. A selective Cr depletion was observed to weaken the stability of the passive film on the alloys.Whereas passivity of Ni became stable in lead containing solution, Cr and Fe passivity becameunstable
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.1545.pdf