|
4630 |
|
Thursday, May 12, 2016, Room 3C + 3D 1:40 PM Amorphous Coatings |
|
Simulated deep-sea corrosion behaviors of Fe-based amorphous coatings |
|
Cheng Zhang* / Huazhong University of Science and Technology, P.R. China Zhi-Wei Zhang/ Huazhong University of Science and Technology, P.R.China Wei Wang/ Huazhong University of Science and Technology, P.R.China Lin Liu/ Huazhong University of Science and Technology, P.R.China |
|
There is keen interest to exploit deep-sea due to its huge resources. However,the high-pressure corrosive deep-sea environment is a great challenge for the structure materials used. In this paper, the corrosion behavior of an new alloy materials,Fe-based amorphous coatings prepared by HVOF,is first studied under simulated deep sea environment in the laboratory, and compared with the commonly used 316L stainless steel alloy. The passivation and pitting behaviors of the two materials are investigated at 1 atm and 80 atm through various in-situ electrochemistry techniques including potentiodynamic and potentiostatic polarizations,Mott-Schottky measurements and 3D optical microscopy observations.Our results will show that the hydrostatic pressure remarkably affacted the pitting kinetics behaviors of both materials. The amorphous coating will be demonstrated to perform better than the 316L SS alloys regarding the pitting resistance under deep-sea enviornment.The finding will open new applications for the amorphous coatings. |