材料と環境 Vol. 73 (2024), No. 5
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キーワードランキング
08 Sep. (Last 30 Days)
材料と環境 Vol. 73 (2024), No. 5
原子炉内模擬水SCC試験に使用したType-316ステンレス鋼製負荷治具の損傷
竹本 幹男, 竹田 貴代子
pp. 123-133
DOI:
10.3323/jcorr.73.123抄録
Authors experienced two type damages in the Type-316 stainless steel loading devices which were used for SCC tests in simulated PWR primary water or BWR water. These damages were 1) cracking at the bottom of the commercial rolled thread used in the simulated PWR primary water at 340℃ for 3,000 hours and 2) cracking at the round corner of the cantilever beam type loading device used in the simulated BWR water at 288℃ for 1,000 hours. We observed fracture surfaces of the crackings in the devices and compared them with fracture surfaces in our previous and recent new SCC specimens. The fractographic study revealed that both quasi-cleavage transgranular fracture surface and intergranular surface existed in the device as well the SCC specimens. We therefore postulated that the crackings in the devices were produced by environmental assistance of high temperature water, and not by the mechanical fracture due to materials defects.
フローセルを用いて局所施工したアルミニウム陽極酸化皮膜の耐食性評価
篠崎 一平, 纐纈 知己, 河原崎 琢也, 榊原 洋平
pp. 134-138
DOI:
10.3323/jcorr.73.134抄録
To investigate the effect of localized repair of anodized film on Aluminum, corrosion resistance of anodized A1050 with re-anodized film using a flow cell was evaluated by CASS testing. The interface between the anodized film and the re-anodized film had a thinner film. It was found that corrosion of the anodized film initiated on this film interface and progressed to the initial anodized film side.
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