Effects of Cu Contents on Corrosion Resistance of Ni-Cr Alloy
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- ENDO Kazuhiko
- Tsurumi University, School of Dental Medicine, Department of Dental Engineering
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- HIRANO Susumu
- Tsurumi University, School of Dental Medicine, Department of Dental Engineering
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- HIRASAWA Tadashi
- Tsurumi University, School of Dental Medicine, Department of Dental Engineering
Bibliographic Information
- Other Title
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- Ni-Cr合金の耐食性に及ぼす添加Cu元素の影響
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Abstract
The effects of Cu content on the corrosion resistance of Ni-Cr alloys were investigated.Cu was added in 5wt% increments to 30wt% in Ni-15Cr alloys.The alloys were evaluated in as-cast condition using Ringer's solution.By applying the square wave current method, the polarization resistance was measured for 50 days, along with corrosion potential.The average corrosion rate was calculated from the weight loss of test pieces.The corrosion potential became noble and polarization resistance increased with addition of Cu.The results indicated that the tendency for Ni-Cr alloys to passivate was enhanced by the addition of Cu.X-ray microanalyses on tested specimens revealed the presence of segregations and Cu rich regions were corrosion resistant.It was also demonstrated by atomic absorption spectrophotometry that Ni was dissolved into Ringer's solution whereas the amounts of Cr and Cu ions were small.The average polarization conductance values during the test period were related to the real corrosion rate as:icorr =K・Ycorr The constant K value for Ni-Cr alloys determined in Ringer's solution at 37℃ was 26mV.
Journal
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- The Journal of the Japanese Society for Dental Materials and Devices
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The Journal of the Japanese Society for Dental Materials and Devices 5 (2), 301-309, 1986
The Japanese Society for Dental Materials and Devices
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Details
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- CRID
- 1390001204210631168
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- NII Article ID
- 110002987915
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- ISSN
- 21884188
- 02865858
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed