Rotating cylinder를 이용한 탄소강의 유동가속부식 평가
공학 > 금속공학
박태준 ( Tae Jun Park ) , 이은희 ( Eun Hee Lee ) , 김경모 ( Kyung Mo Kim ) , 김홍표 ( Hong Pyo Kim )
한국부식방식학회(구 한국부식학회)
Corrosion Science and Technology 2012년, 제11권 제6호, 257~262페이지(총6페이지)
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    Flow accelerated corrosion (FAC) of the carbon steel piping in nuclear power plants (NPPs) has been major issue in nuclear industry. Rotating cylinder FAC test facility was designed and fabricated and then performance of the facility was evaluated. The facility is very simple in design and economic in fabrication and can be used in material and chemistry screening test. The facility is equipped with on line monitoring of pH conductivity dissolved oxygen (DO) and temperature. Fluid velocity is controlled with rotating speed of the cylinder with a test specimen. FAC test of SA106 Gr. B carbon steel under 4 m/s flow velocity was performed with the rotating cylinder at DO concentration of less than 1 ppb and of 1.3 ppm. Also a corrosion test of the carbon steel at static condition that is at zero fluid velocity of test specimen and solution was performed at pH from 8 to 10 for comparison with the FAC data. For corrosion test in static condition the amount of non adherent corrosion product was almost constant at pH ranging from 8 to 10. But adherent corrosion product decreased with increasing pH. This trend is consistent with decrease of Fe solubility with an increase in pH. For FAC test with rotating cylinder FAC test facility the amount of non adherent corrosion product was also almost same for both DO concentrations. The rotating cylinder FAC test facility will be further improved by redesigning rotating cylinder and FAC specimen geometry for future work.
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