Effect of Benzotriazole on the Localized Corrosion of Copper Covered with Carbonaceous Residue

Autor:	Yun-Ho Lee, Min-Sung Hong, Sang-Jin Ko, Jung-Gu Kim
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	copper corrosion localized corrosion BTA inhibitor inhibition carbonaceous residue Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Zdroj:	Materials, Vol 14, Iss 11, p 2722 (2021)
Druh dokumentu:	article
ISSN:	1996-1944
DOI:	10.3390/ma14112722
Popis:	Carbonaceous residues on copper pipes during the manufacturing process are known to be one of the main causes of pitting corrosion on copper pipes. This study examined the corrosion-inhibiting effect of benzotriazole (BTA) on C12200 copper pipes with carbonaceous film in synthetic tap water. In the absence of BTA, localized corrosion mechanisms due to galvanic corrosion, crevice corrosion, and oxygen-concentration cell were proposed in the boundary part of the carbonaceous film on the copper through X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS) analyses. Electrochemical tests showed that BTA inhibits corrosion by forming Cu−BTA complexes on all over the copper surface where carbonaceous film is present. BTA mitigates galvanic corrosion and crevice corrosion at the boundary of the carbonaceous film and suppresses the formation of oxygen-concentration cells through the formation of a Cu−BTA complex.
Databáze:	Directory of Open Access Journals
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