The purpose of this experiment was to find out the effects on metal corrosion of 2 types of tree, 7 types of wood based products and 4 types of cement that is currently being used as internal museum materials. By using the Oddy test as a corrosion test, with the materials that are used in the museum and the metal test pieces(Gilding, Silver, Iron, Bronze, Copper) are exposed in a high temperature( 60℃ ) and humidity for 28 days. After 28 days, we compare and analysis the difference between the metal test piece that was used before and after the test. We found that gilding and bronze did not occur corrosions on the surface but iron(Fe)and copper(Cu) also silver(Ag) had corrosions on the surface in different forms.

The likelihood of failure for the stress corrosion cracking (SCC) of caustic cracking, which affect to a risk of facilities, was analyzed through the risk based-inspection using API-581 BRD. We found that SCC of the caustic cracking was occurred above 5 % NaOH concentration, and the technical module subfactor (TMSF) was maximized for above 50 % concentration. The heat traced and monitoring were not sensitive to the TMSF with NaOH concentration and temperature. But the steam out was more of less affect minimum value of the TMSF. Also, the inspection number, the inspection effectiveness, and the year since inspection were very sensitive to the TMSF with NaOH concentration and temperature. Therefore, the plan of next inspection will be established with compositively considering those at once.

본 논문은 지하매설 철 구조물의 전기적 부식방지를 위해 Mg 희생양극을 사용하는 부식방지 기술에 대한 연구 또한 활발히 진행되고 있다. Mg 희생양극은 지하에 매설되는 철 구조물(파이프, 탱크, 파일, 고정 앵커 등)을 부식으로부터 보호하기 위하여 사용되는 것이다. 본 연구에서는 종래의 산화 소화용 표면 보호재로 이용되고 있는 비교적 값이 싼 CaCl2 염화물을 이용하여 마그네슘 합금제조 시 CaCl2 염화물의 표면보호 효과 및 제조된 Mg-Ca 합금들의 전기화학적 특성을 조사하였다 금속 Ca가 아닌 산화방지 및 소화 용제로 이용되고 있는 염화물(CaCl2)을 이용하여 자연부식 전위 값이 -1.695VSCE 이하, 사용효율도 59% 이상인 Mg-Mn-Ca 희생양극제의 제조기술을 확립하였다.

In recently, the method estimated construction's defeat using the infrared thermography was prefer to method of new repair and estimate as a good point that simple of application and save labor, what is more economic than other techniques and can reduce need time. The purpose of this study is to develope the technique to measure the corrosion of reinforcing bars using the infrared thermal photography graphic data. In this page, the former final purpose establishment that galvanic corrosion method of reinforced bars and infrared thermography system, and studied trend of thermography and photography graphic data by parameters of corrosion of specimens, atmosphere temperature, concrete cover depth etc.

본 논문은 국내 PWR 발전소에서 S/G tube 재질로 사용되고 있는 Inconel 600 및 690에 대한 부식 실험을 수행함으로써 작업자들의 주요 피폭원인 의 생성량을 예측하고자 하였다. 이를 위해 Inconel 600 및 690 재질로 총 12개의 시편을 제작하여 실제 발전소의 운전조건과 유사하거나 가혹한 조건에서 전면 부식실험을 pH별로 20일씩 총 60일간 수행하였고, 실험 결과를 정량적으로 분석하기 위해 GDS(Glow Discharge Spectrometer) 장비를 사용하였다. GDS 장비를 이용하여 정량적으로 분석한 결과 pH 7 및 9에서는 Inconel 600이 Inconel 690에 비해 부식이 잘 되는 것으로 나타난 반면, pH 4에서는 Inconel 690이 부식이 더 잘 되는 것으로 평가되었다. 이러한 경향을 보이는 것은 과도상태의 영향이 과도하게 반영된 것에 기인한 것으로 비교적 정확한 결론을 도출하기 위해서는 장시간의 부식 실험을 수행함으로써 과도상태에 의한 영향을 최소화해야 할 것으로 판단된다.

The likelihood of failure by the corrosion of high temperature H2S/H2, which affect to a risk of facilities, was analyzed through the risk based-inspection using API-581 BRD. We found that the corrosion rate was increased as temperature and H2S concentration were increased. Also, the technical module subfactor(TMSF) was increased as an used you increased, material thickness decreased, inspection number decreased, and inspection effectiveness increased. In these conditions, the maximum value of TMSF was not varied, but the TMSF was sensitively varied at low temperature for high concentration of H2S.