Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
2007-12-25
2007-12-25
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
C029S890140, C029S401100, C029S425000
Reexamination Certificate
active
10917457
ABSTRACT:
The present invention relates to a method of producing the sensors for monitoring corrosion of heat exchanger tubes in a thermal power plant. The sensor is made of the tubes taken out from actual heat-exchanger. As a result, the sensor not only has the same material as the actual heat-exchanger tubes, but also has the same surface state where it contacts the working medium. Therefore, a serious technical difficulties have been solved that the sensor made by the prior art can't measure different corrosion states of actual heat-exchanger tubes, that the corrosion rate measured is different from the corrosion rate of actual heat-exchanger tubes, and that the cost of anti-corrosive treatments is high . By use of the sensor made by the present invention, the different corrosion states of actual heat-exchanger tubes can be measured, not only the rate of uniform corrosion of actual heat-exchanger tubes can be measured but also the rate of localized corrosion of the heat-exchanger tubes can be measured. Moreover, the cost of treatment of anti-corrosion can be decreased.
REFERENCES:
Yang, B., Corrosion Engineering, vol. 51, No. 2, pp. 153-164, (1995).
Strauss, S. D., Water Treatment.
Uchida et al., Corrosion, Paper No. 408, pp. 408/1-408/13, (1997).
Cao Jieyu
Liu Bing
Liu Tao
Long Guojun
Song Jingxia
Afzali Sarang
Bryant David P.
Thermal Power Research Institute
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