Monitoring System of Corrosion for Dental alloy

本研究的目的是评估牙科合金的腐蚀损伤，并设计腐蚀测试系统。从电化学测量中选择恒电量法。全计算机控制的仪器需要采用恒电量法作为腐蚀监测系统。为此，本项目资助了SEIKO EG&G公司的283型恒电位仪、IBM个人计算机和SEKO EG&G公司的352/252型恒电位仪软件，但352/252型恒电位仪软件不能控制恒电量的测量。然后我们改进了软件，但这是非常艰苦的工作。因此，我们留下它的精工EG&G。恒电位法应用于使用的腐蚀监测系统，而不是恒电量法。通过恒电位法获得牙科合金的结果（表1）。在人工唾液中，牙科合金对硫化物腐蚀的敏感性可以通过腐蚀监测系统进行分级，另外还需要进行校准和验证，以考察其适用性。恒电位法与恒电量法一样，操作简单，但测量时间长。若能对恒电量法的软件进行改进，就能将恒电量法应用于腐蚀监测系统中。

The aim of this study to estimate of the damage for dental alloys by corrosion, and design the system of corrosion measurement. The method was selected coulostatic method from electrochemical measurement. Full computer control apparatus need to use the coulostatic method as monitoring system of corrosion. Therefor potentiogalvanostat Model283 (SEIKO EG&G), personal computer(IBM) and software Model352/252(SEKO EG&G) was got by this grant.However the Model352/252 software was not able to control the coulostatic measurement. Then we improved the software, but it was very hard work. So we leave it the SEIKO EG&G.Potentiostatic method was applied to use the monitoring system of corrosion instead of coulostatic method. The results of dental alloys were obtained by means of potentiostatic method (Table 1). In artificial saliva the susceptibility of dental alloys to sulfide corrosion can rank to use the monitoring system of corrosion, Additionally it has to calibrate and confirm to investigate applicability. Potentiostatic method is simple procedure as same as coulostatic method, but measurement time is so long. If the software for coulostatic method is improved, we will applicant of coulostatic method to the monitoring system of corrosion.