Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (29): 5405-5408.doi: 10.3969/j.issn.1673-8225.2011.29.021

Previous Articles     Next Articles

Ni ion precipitation from the repeated casted nickel-chrome alloy in corrosion

Xiao Yue1, Wang Dan1, Yu Ting-ting1, Ma Shu-ming1, Zhang Chi2   

  1. 1College of Stomatology, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China
    2College of Stomatology, Sichuan University, Chengdu  641400, Sichuan Province, China
  • Received:2011-03-11 Revised:2011-06-20 Online:2011-07-16 Published:2011-07-16
  • Contact: Ma Shu-ming, Physician, College of Stomatology, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China sbcymsm@hotmail.com
  • About author:Xiao Yue, Associate professor, College of Stomatology, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China sbcymsm@hotmail.com.cn

PDF

418

Abstract:

BACKGROUND: Whether repeated casted nickel-chrome alloy can increase the precipitation of nickel ions thereby to reduce the corrosion resistance is controversial.
OBJECTIVE: To detect the nickel ion amount released from repeated casted nickel-chrome alloy in the artificial saliva in the non-vacuum state and to analyze the influence of cast times on the alloy corrosion resistance.
METHODS: The nickel-chrome alloy was used to roast the porcelain alloy repeatedlyⅠ, Ⅱ, Ⅲ, Ⅳ generations. The specimens were immersed in the artificial saliva with pH of 6.8 and 4.0 for (168±1) hours at (37±1) ℃. Z-5000 atomic absorption spectrophotometer was used to determine the precipitation of nickel ions under different pH values.
RESULTS AND CONCLUSION: Under the same pH value, nickel-chrome alloy Ⅳ was significantly different from other generations (P < 0.05), and had the largest amount of nickel ions, the secondary was Ⅲ, Ⅱ. With the decrease of pH value, the alloy had the decreased corrosion resistance with increased amount of nickel ions. The findings indicated that under non-vacuum condition, repeated casted nickel-chrome alloy has a decreased corrosion resistance and increased nickel ions with the increase of casting times.

CLC Number: