Investigating the Mechanism behind 'Ant Nest' Corrosion on Copper Tube

被引：17
作者：
Situmorang, Riky Stepanus [1 ]
Kawai, Hideki [2 ]
机构：
[1] Muroran Inst Technol, Div Engn, 27-1 Mizumoto Cho, Muroran, Hokkaido 0508585, Japan
[2] Muroran Inst Technol, Dept Mech Syst Engn, 27-1 Mizumoto Cho, Muroran, Hokkaido 0508585, Japan
来源：
MATERIALS | 2018年 / 11卷 / 04期
关键词：
copper tube; ant nest" corrosion (ANC); pitting attack; comproportionation reaction; disproportionation reaction; AIR-CONDITIONING UNITS; STRESS-CORROSION; HEAT-EXCHANGER; ACID VAPOR; FAILURE; CRACKING; SYSTEMS;
D O I：
10.3390/ma11040533
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A research investigation of "ant nest" corrosion (ANC) on copper tube was conducted in terms of the variables of the corrosion potential and pH value in 10(3) ppm copper formate solution over 20 days. The paper presents the surface and cross-sectional observations and examines Cu2O and H2O as the stable chemical species produced. A Cannizzaro reaction as a disproportionation reaction from formic acid and a comproportionation reaction from the metallic copper tube and copper formate solution critically influenced the ANC mechanism. The paper also categorizes the ANC attack as a rapid reaction system from the electrochemical point of view by using a polarization resistance curve.
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页数：17
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