Long-term field exposure corrosion behavior investigation of 316L stainless steel in the deep sea environment

Abstract The long-term deep sea corrosion behavior of 316L stainless steel was investigated through the field exposure corrosion experiments at 1200–3000m depths. Differing from the results of simulated tests and shallow sea field exposure, XPS analysis showed a result of only trivalent irons containing oxides and hydroxides instead of co-existence of bi- and tri-valent irons. With the sea depth increasing, corrosion potentials and pitting potentials shift negatively, and the data of 3000 m depth are −0.240 V (vs. SCE) and 0.201 V (vs. SCE), respectively, revealing the corrosion status is deteriorated. Corrosion behavior analysis showed that the corrosion weight loss of 316L is mainly attributed to crevice corrosion and pitting corrosion, and that the highest corrosion rate is 0.96 μm y−1 accompanying with a biggest pitting depth of 18.4 μm after one year exposing. The corrosion rate obtained from 3000 m deep sea is 3.2 times as much as that obtained from the shallow-sea environment.

[1]  D. Clark,et al.  Effects of Hyperbaric Pressure on a Deep-Sea Archaebacterium in Stainless Steel and Glass-Lined Vessels , 1991, Applied and environmental microbiology.

[2]  E. Han,et al.  Corrosion behavior for Alloy 690 and Alloy 800 tubes in simulated primary water , 2013 .

[3]  S. Dexter.  Effect of Variations in Sea Water Upon the Corrosion of Aluminum , 1980 .

[4]  W. Hartt,et al.  Deep water cathodic protection: Part 2-Field deployment results , 2003 .

[5]  Xiaogang Li,et al.  Comparative study on the stress corrosion cracking of X70 pipeline steel in simulated shallow and deep sea environments , 2017 .

[6]  E. Canepa,et al.  Corrosion behaviour of aluminium alloys in deep-sea environment: A review and the KM3NeT test results , 2018 .

[7]  Yange Yang,et al.  A stochastic analysis of the effect of hydrostatic pressure on the pit corrosion of Fe–20Cr alloy , 2009 .

[8]  R. Venkatesan.  Studies On Corrosion Of Some Structural Materials In Deep Sea Environment , 2000 .

[9]  S. Sawant,et al.  Corrosion behaviour of metals and alloys in the waters of the Arabian Sea , 1990 .

[10]  Rongguang Wang.  An AFM and XPS study of corrosion caused by micro-liquid of dilute sulfuric acid on stainless steel , 2004 .

[11]  S. Bernasek,et al.  Characterization of the “native” surface thin film on pure polycrystalline iron: A high resolution XPS and TEM study , 2007 .

[12]  C. Jang,et al.  Potentiodynamic polarization behaviour of AISI type 316 stainless steel in NaCl solution , 2013 .

[13]  Lin Liu,et al.  Degradation in pitting resistance of 316L stainless steel under hydrostatic pressure , 2016 .

[14]  T. Fukutsuka,et al.  XPS studies on passive film formed on stainless steel in a high-temperature and high-pressure methanol solution containing chloride ions , 2008 .

[15]  A. Beccaria,et al.  Influence of passive film composition and sea water pressure on resistance to localised corrosion of some stainless steels in sea water , 1995 .

[16]  M. Jenko,et al.  Electrochemical and XPS studies of the passive film formed on stainless steels in borate buffer and chloride solutions , 2007 .

[17]  K. Rokosz,et al.  Electrochemical and XPS studies of AISI 316L stainless steel after electropolishing in a magnetic field , 2008 .

[18]  Pierluigi Traverso,et al.  A review of studies on corrosion of metals and alloys in deep-sea environment , 2014 .

[19]  S. Fujimoto,et al.  XPS characterization of passive films formed on Type 304 stainless steel in humid atmosphere , 2012 .

[20]  Weimin Guo,et al.  Corrosion Behavior of Q235 Steel Exposed in Deepwater of South China Sea , 2018, Journal of Materials Engineering and Performance.

[21]  G. Luciano,et al.  Corrosion Behaviour of Al, Cu, and Fe Alloys in Deep Sea Environment , 2013 .

[22]  R. Venkatesan,et al.  Corrosion of ferrous alloys in deep sea environments , 2002 .

[23]  K. Venkat,et al.  Corrosion of metals and alloys in the coastal and deep waters of the Arabian Sea and the Bay of Bengal , 1993 .

[24]  B. Harvey,et al.  Ultrasonically enhanced corrosion of 304L stainless steel I: the effect of temperature and hydrostatic pressure. , 1997, Ultrasonics sonochemistry.

[25]  P. Beeley,et al.  Passivity breakdown of 316L stainless steel during potentiodynamic polarization in NaCl solution , 2016 .

[26]  M. Schumacher,et al.  Seawater corrosion handbook , 1979 .

[27]  Guoqing Wu,et al.  Effect of YAl2 Particles on the Corrosion Behavior of Mg–Li Matrix Composite in NaCl Solution , 2019, Materials.