材料と環境 Vol. 72 (2023), No. 11
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材料と環境 Vol. 72 (2023), No. 11
防錆油について
長瀬 直樹
pp. 278-283
DOI:
10.3323/jcorr.72.278抄録
Rust preventive oil is used for relatively short periods of time, such as during storage and transportation during the manufacture of metal parts. It is one of the rust prevention means used for the purpose of temporary rust prevention for a period of time.
HCl水溶液中の溶存90Sr及び137CsがSUS 316Lの腐食電位に及ぼす影響
青山 高士, 佐藤 智徳, 上野 文義, 加藤 千明, 佐野 成人, 山下 直輝, 五十嵐 誉廣
pp. 284-288
DOI:
10.3323/jcorr.72.284抄録
In order to analyze the effect of beta particles in solution on the corrosion of Type 316L stainless steel, the effect of dissolved 90Sr on the corrosion potential was investigated. 90Sr standard solution and 137Cs standard solution were dropped into HCl while the corrosion potential was measured in HCl. As a result, the potential increase in the solution with 90Sr standard solution was larger than that in the solution with 137Cs standard solution. The results were verified by calculations, which show that the difference in the rate of formation of H2O2 in solution due to water radiolysis causes a difference in the change in potential in both solutions.
文化財建造物保存修理等に供する現代製鉄法による新たな和釘の耐食性評価
松本 雅充, 迫田 章人, 末廣 正芳, 西 隆之, 渡邊 緩子, 本弓 省吾
pp. 289-298
DOI:
10.3323/jcorr.72.289抄録
The purpose is to inherit the technical properties of the past as much as possible to manufacture Japanese nails, Wakugi, used for preservation and repair of Japanese wooden buildings. Therefore, we investigated the technical properties of Wakugi from the Azuchi-Momoyama period to the Edo period, when Tatara ironmaking reaches maturity, from the viewpoints of chemical composition, surface film structure, and corrosion resistance. Prevention of iron stain on wood and long-term corrosion resistance were evaluated by electrochemical measurements and accelerated corrosion tests on Wakugi made by hot forging by handmade work by blacksmiths.
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