Chloride cracking - Chloride cracking

Japanese: 塩化物割れ - えんかぶつわれ
Chloride cracking - Chloride cracking

...Pressurized water reactors use a nickel alloy material called alloy 600, and there have been cases of this type of grain boundary caustic cracking occurring in steam generator systems.
[Chloride cracking]
Austenitic stainless steels, such as 304 steel (18Cr-8Ni-Fe), were developed in the 1920s, but soon became problematic due to their tendency to crack in high-temperature aqueous solutions containing chloride ions and oxygen. The first conference on stress corrosion cracking was held in 1944, and since then, active research has been conducted into materials that do not suffer from stress corrosion cracking in high-temperature, high-pressure chloride solutions.

*Some of the terminology that refers to "chloride cracking" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…加圧水型原子炉には600合金というニッケル合金材料が使われるが,蒸気発生器系統でこの種の粒界型の苛性割れ発生の事例が生じたことがある。
[塩化物割れ]
 304鋼(18Cr‐8Ni‐Fe)に代表されるオーステナイト系ステンレス鋼は1920年代に開発されたものであるが,塩化物イオンと酸素を含む高温水溶液中で割れが発生することはすぐに問題となった。1944年には第1回の応力腐食割れの会議が開かれ,以後高温高圧塩化物溶液中で応力腐食割れをおこさない材料の研究が盛んに行われた。…

※「塩化物割れ」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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