Huang Yanliang

Effects of anaerobe in sea bottom sediment on the corrosion of carbon steel

This in situ corrosion study of steel in sea bottom sediment by the “Plate Transplanting Burying Method” (MD method) showed that the corrosion rate of steel in sea bottom sediment with sulfur reduction bacteria (SRB) can be as high as ten times that in sea bottom sediment without SRB. The experiments in simulating sea bottom sediments with different concentrations of cultured SRB showed that the electrochemical polarization behaviour of steel in sea bottom sediment with and without SRB were different. SRB altered the polarization behaviour of steel significantly by acidifying the environment so that apparent hydrogen depolarization occurred and accelerated the corrosion of steel.

Stress corrosion cracking of AISI 321 stainless steel in acidic seawater

The stress corrosion cracking (SCC) of AISI 321 stainless steel in acidic in acidic seawater was studied by slow strain rate (SSR) technique and fracture mechanics method. The fractured surface was characterized by cleavage fracture. The inhibiting effects of KI on SCC behavior were also covered in this detailed study which showed that they were mainly attributable to their inhibition on anodic reaction. The SCC mechanism study supported the unified mechanism of SCC and corrosion fatigue cracking (CFC).