Effects of Fluid Flow Rate and Stress Amplitude on the Initiation and Growth Behavior of Corrosion Pits on an Annealed Carbon Steel
抄録
In order to clarify the effects of the fluid flow rate and stress amplitude on the the initiation and growth behavior of corrosion pits, round, smooth specimens were rotated with various speeds in sodium chloride aqueous solution. The results are summarized as follows : [1] The pit growth behaviors were prescribed by Eq. (1), regardless of fluid flow rates and stress amplitudes. [2] The pit initiation time decreases with increase of the fluid flow rate and stress amplitude. [3] For small pits whose sizes are about 0.03mm, the pit growth rates increase with the fluid flow rate, while the growth rates for pits above 0.08mm are independent of the fluid flow rate and smaller than those of 0.03mm. The pit growth rate in the case of 100MPa is 5～10times lager than those of nonstressing.
雑誌名
日本機械学會論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A
炭素鋼S45C焼なまし材の腐食ピットの発生・成長挙動に及ぼす流速および応力振幅の影響
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