給湯用銅管の潰食現象に及ぼすマイクロバブルの影響

摘要

The results of Computational fluid dynamics (CFD) simulations and the observation of the flow pattern in the model plumbing equipment showed that the locus of the micro-bubbles affected the erosion corrosion of copper tube. Tap water containg the micro-bubble attacked copper tube and caused erosion corrosion for 3 months. Consequently, it could be considered that erosion corrosion of copper tube occurred and propagated when the protective film formed on the tubes surfaces were continuously broken by micro-bubbles attack.%強制循環式給湯システムの銅配管に発生する潰食現象rnに関してこれまでに多くの研究がなされている。著rn者らは，銅管の潰食は給湯水中の溶存酸素濃度が給水中rnのそれより高い場合に発生しやすいことを報告し，rn潰食は過飽和溶存空気の影響が大きいことを示した。