Study on the corrosion resistance of Cr ahoy in the artificial saliva with different pH value.
- Author:
Run-gang SU
1
;
Chun-hua LI
;
Ye QIAN
Author Information
- Publication Type:Journal Article
- MeSH: Corrosion; Dental Alloys; Electrochemistry; Saliva, Artificial; Surface Properties; Titanium
- From: West China Journal of Stomatology 2010;28(1):34-37
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo study the effect on the corrosion resistance of Cr alloy in the artificial saliva with different pH value in vitro.
METHODSCompared to Ti alloy, electrochemical technique was used to measure the electric potential of corrosion (E(corr)), current density of corrosion (I(corr)) Cr alloy in the artificial saliva with different pH value. The corrosion and corrosion resistance mechanism on Cr alloy in the artificial saliva with different pH value had been investigated by the EIS curves.
RESULTSThe corrosion resistance of Co-Cr alloy was better than Ti alloy. The value of I(corr) was lower and the value of R(p) was larger than Ti alloy. The corrosion resistance of Ni-Cr alloy was worse than Ti alloy. The value of I(corr) was larger and the value of R(p) was lower than Ti alloy. The pH value in the artificial saliva was decreased, the I(corr) value of three types of alloy increased, the R(p) value of three types of alloy decreased. But the changes of Co-Cr alloy was smaller than that of Ti alloy or Ni-Cr alloy.
CONCLUSIONThe corrosion resistance of Co-Cr alloy was superior to that of Ni-Cr alloy and Ti alloy. In the acid artificial saliva, the corrosion resistance of three types of alloy descended evidently.
