In:
Materials and Corrosion, Wiley, Vol. 73, No. 7 ( 2022-07), p. 1110-1120
Abstract:
The corrosion behaviors of Cu–7.42Sn–0.156P and Cu–5.78Sn–0.162P alloys in different solutions were investigated. The results show that the Cu–Sn–P alloy with higher Sn content exhibits better corrosion resistance. In the NaCl, NaHCO 3 , and NaCl+NaHCO 3 solutions, compared with Cu–5.78Sn–0.162P alloy, the corrosion current densities of Cu–7.42Sn–0.156P alloy are reduced by 25.2%, 36.9%, and 34.5%, and the polarization resistances are increased by 32.0%, 25.4%, and 29.9%. The Cu–Sn–P alloys have the best corrosion resistance in the NaHCO 3 solution, followed by the NaCl solution and the worst in the NaCl + NaHCO 3 solution. The increase of Sn is helpful to improve the density and spalling resistance of the corrosion film. There is a double‐layer structure for the corrosion film of Cu–Sn–P alloy. For the alloys immersed in the NaCl solution and the NaCl+NaHCO 3 solutions, the corrosion films consisted of Cu 2 O, CuO, and SnO 2 . For the alloys immersed in the NaHCO 3 solution, the corrosion films are composed of Cu 2 O, CuO, SnO, and SnO 2 . The increase of Sn content in the alloy can increase the contents of Cu 2 O and SnO in the corrosion films.
Type of Medium:
Online Resource
ISSN:
0947-5117
,
1521-4176
DOI:
10.1002/maco.202113031
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
1481051-7
detail.hit.zdb_id:
1224916-6
detail.hit.zdb_id:
202688-0
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