Effects of rare earth modifying inclusions on the pitting corrosion of 13Cr4Ni martensitic stainless steel

2021 ◽  
Author(s):  
Changgang Wang ◽  
Rongyao Ma ◽  
Yangtao Zhou ◽  
Yang Liu ◽  
Enobong Felix Daniel ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Rare Earth ◽  
Pitting Corrosion ◽  
Martensitic Stainless Steel

Effect of Carbides on the Pitting Corrosion of Mod. 440A Martensitic Stainless Steel

2015 ◽  
Vol 25 (12) ◽  
pp. 666-671
Author(s):  
Soon-Doo Kwon ◽  
Sung-Hwa Heo ◽  
Chang-Yong Kang
Keyword(s):  
Stainless Steel ◽  
Pitting Corrosion ◽  
Martensitic Stainless Steel

Pitting Resistance of Domestic Super Martensitic Stainless Steel 00Cr13Ni5Mo2

2013 ◽  
Vol 834-836 ◽  
pp. 370-373
Author(s):  
Shi Dong Zhu ◽  
Jin Ling Li ◽  
Hai Xia Ma ◽  
Li Liu
Keyword(s):  
Stainless Steel ◽  
Corrosion Rate ◽  
Pitting Corrosion ◽  
Martensitic Stainless Steel ◽  
Pitting Potential ◽  
Electrochemical Technology ◽  
Super Martensitic Stainless Steel ◽  
Nacl Concentration ◽  
Made In China ◽  
Made In

Pitting resistance of super martensitic stainless steel 00Cr13Ni5Mo2 made in China has been investigated by employing electrochemical technology and chemical immersion methods. The results showed that pitting potential of super martensitic stainless steel decreased with the increasing of NaCl concentration and temperature, respectively. And corrosion rate of super martensitic stainless steel increased with the increasing of temperature. Furthermore, compared to super martensitic stainless steel made in Japan, the domestic one was better in terms of pitting potential, pitting corrosion rate and the density of the pits, but worse in terms of the depth of the pits.

Effect of Rare Earth on the Inclusions and Pitting Resistance of Ferrite Stainless Steel

2012 ◽  
Vol 531 ◽  
pp. 47-50
Author(s):  
Xiao Liu ◽  
Jian She Li
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Rare Earth ◽  
Pitting Corrosion ◽  
Stainless Steels ◽  
Anodic Polarization ◽  
Electrochemical Methods ◽  
Polarization Curves ◽  
Metallographic Examination ◽  
Pitting Corrosion Resistance

The anodic polarization curves of 430 ferrite stainless steels with various RE contents in 3.5% NaCl neutral solutions have been measured by electrochemical methods. The effect of RE on pitting corrosion resistance of 430 ferrite stainless steels has been studied by the metallographic examination. The results show that sulfide and other irregular inclusions are modified to round or oval-shaped RE2O2S and RES after adding RE to 430 ferrite stainless steesl. RE makes sulfide, and other irregular inclusions change to dispersed round or oval-shaped RE inclusions, effectively inhibits the occurrence of pitting corrosion, thereby enhancing the corrosion resistance of 430 ferrite stainless steels.

Effect of Rare Earth on the Inclusions and Pitting Resistance of Austenitic Stainless Steel

2013 ◽  
Vol 718-720 ◽  
pp. 29-32 ◽  
Author(s):  
Xiao Liu ◽  
Yu Bo
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Rare Earth ◽  
Austenitic Stainless Steel ◽  
Pitting Corrosion ◽  
Stainless Steels ◽  
Anodic Polarization ◽  
Austenitic Stainless Steels ◽  
Metallographic Examination ◽  
Pitting Corrosion Resistance

The anodic polarization curves of 21Cr-11Ni austenitic stainless steels with various RE contents in 3.5% NaCl neutral solutions have been measured by electrochemical methods. The effect of RE on pitting corrosion resistance of 21Cr-11Ni stainless steels has been studied by the metallographic examination. The results show that sulfide and other irregular inclusions are modified to round or oval-shaped RE2O2S and RES after adding RE to 21Cr-11Ni stainless steesl. RE makes sulfide, and other irregular inclusions change to dispersed round or oval-shaped RE inclusions, effectively inhibits the occurrence of pitting corrosion, thereby enhancing the corrosion resistance of 21Cr-11Ni austenitic stainless steels.

Pitting corrosion of martensitic stainless steel in halide bearing solutions

2016 ◽  
Vol 112 ◽  
pp. 233-240 ◽  
Author(s):  
S. Pahlavan ◽  
S. Moazen ◽  
I. Taji ◽  
K. Saffar ◽  
M. Hamrah ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Pitting Corrosion ◽  
Martensitic Stainless Steel

Pitting corrosion of super martensitic stainless steel 00Cr13Ni5Mo2

2014 ◽  
Vol 61 (6) ◽  
pp. 387-394 ◽  
Author(s):  
J.L. Li ◽  
C.T. Qu ◽  
S.D. Zhu ◽  
L. Liu ◽  
Z.Q. Gao
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Martensitic Stainless Steel ◽  
Pitting Potential ◽  
Content Type ◽  
Pitting Corrosion Resistance ◽  
Super Martensitic Stainless Steel ◽  
The Difference ◽  
Made In

Purpose – The purpose of this study was to investigate the pitting resistance and assess the critical pitting temperature (CPT) of a super martensitic stainless steel, 00Cr13Ni5Mo2, made in China, considering especially the difference in the pitting corrosion resistance between the domestic super martensitic stainless steel and an imported one. Design/methodology/approach – Potentiodynamic sweep tests were applied to investigate the effects of four NaCl concentrations (weight per cent) of 1, 3.5, 9 and 17, and four testing temperatures of 30, 50, 75 and 90°C on the pitting resistance of the domestic super martensitic stainless steel in the presence of CO2. Potentiostatic sweep tests were utilized to determine the CPT. Furthermore, chemical immersion exposures, implemented according to the appropriate standard were used to evaluate the difference in the pitting corrosion resistance between the domestic super martensitic stainless steel and an imported one. In addition, the morphology of pits was analyzed using a scanning electron microscope. Finding – The pitting potential of the domestic super martensitic stainless steel decreased with an increase in NaCl concentration and temperature in the presence of CO2. The CPT of the domestic super martensitic stainless steel measured by potentiostatic polarization was 41.16°C. Two types of typical corrosion pits, closed pits formed at 35°C and open pits formed at 50°C, were observed. Furthermore, compared to the super martensitic stainless steel made in Japan, the domestic one was better in terms of pitting potential, corrosion rate and the density of the pits, but worse in terms of the depth of the pits, which may result in a risk of corrosion perforation of tubing and casings. Originality/value – The paper highlights that chloride ions, temperature and the presence of CO2 play an important role on the pitting resistance of super martensitic stainless steel.

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