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Environmentally-Assisted Cracking of Martensitic Stainless Steel Octg Material in H2S-Saturated Condition at Room Temperature to Elevated Temperature

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In martensitic stainless steel used in H2S-saturated condition SSC is regarded as a main concern rather than SCC in material selection for each specific well condition. In this paper by adding hydrogen embrittlement results at elevated temperature environmentally-assisted cracking (EAC) data of SSC and SCC for are reported by using autoclave-based test results. The test condition is based on (1)temperature of 24C(75F) to 200C(392F) (2)20% and 5% NaCl solution (3)actual YS@in-situ as applied stress in four-point-bend-beam specimens (4)pH3.0@in-situ to pH5.0@in-situ which was adjusted by four factors of (a)partial pressure of 5MPa CO2 (b)partial pressure of 0.01MPa H2S (c)0.5%CH3COOH and CH3COONa addition as pH adjustment and (d)temperature.Judging from the domain maps of EAC for 13%Cr-added to 17%Cr-added martensite-based stainless steel OCTG materials the non-failure domain for each sample is limited by cracking and/or corrosion rate. In terms of cracking as testing temperature is higher each material has higher cracking-resistant. More precisely no SSC (SCC) happens anymore at the higher temperature than SSC (or SCC) begins not to occur when an autoclave test was carried out by elevating temperature from room temperature (24C 75F). In terms of corrosion rate it tends to have the higher value when an autoclave test is carried out at the higher temperature. The stability of passivation and protective surface layer on each stainless steel are related to the resistance for these two parameters. Higher-alloyed martensite-based stainless steel has better performance in both cracking and corrosion rate. In addition it was found that martensitic stainless steel do not have the specific cracking-susceptible temperature range at around 80C to 100C (175F to 210F) temperature which duplex stainless steel are said to specifically fail.

Product Number: 51319-13227-SG

Author: Yasuhide Ishiguro

Publication Date: 2019

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Environmentally-Assisted Cracking (SSC And SCC) Of Martensitic Stainless Steel OCTG Material In Sour Environment In 5%Nacl And 20%Nacl Solution

Product Number: 51322-17563-SG

Author: Yuichi Kamo, Yusuke Mizuno, Yasuhide Ishiguro

Publication Date: 2022

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Martensitic stainless steels for OCTG materials are widely used in sweet and mild sour conditions. Environmentally-assisted cracking (EAC) is a major corrosion-related issue when using stainless steels as OCTG materials. The EAC in specific oil/gas well conditions with sour environments is defined as sulfide stress cracking (SSC) and stress corrosion cracking (SCC). The SSC is a type of cracking caused by hydrogen embrittlement, which is attributed to a cathodic reaction under acidic conditions, while SCC is associated with an anodic reaction. SSC testing for martensitic stainless steels for OCTG material is often carried out at or near ambient temperature under conditions simulating condensed water, and SCC tests are conducted at higher temperatures under conditions simulating formation water and/or the brine availability test.

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07087 Corrosion Resistance of Martensitic Stainless Steel OCTG in Severe Corrosion Environments

Product Number: 51300-07087-SG

ISBN: 07087 2007 CP

Author: Mitsuo Kimura, Kei Sakata, and Ken Shimamoto

Publication Date: 2007

$20.00

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11103 Environmental Cracking Performance of Super Martensitic Stainless Steels13Cr in High Chloride Reservoir Fluids Containing H2S/CO2

Product Number: 51300-11103-SG

ISBN: 11103 2011 CP

Author: Roberto Morana , Eugenio Lo Piccolo , Lucrezia Scoppio , Perry Ian Nice

Publication Date: 2011

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Environmentally-Assisted Cracking of Martensitic Stainless Steel Octg Material in H2S-Saturated Condition at Room Temperature to Elevated Temperature

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Environmentally-Assisted Cracking of Martensitic Stainless Steel Octg Material in H2S-Saturated Condition at Room Temperature to Elevated Temperature

Environmentally-Assisted Cracking (SSC And SCC) Of Martensitic Stainless Steel OCTG Material In Sour Environment In 5%Nacl And 20%Nacl Solution

07087 Corrosion Resistance of Martensitic Stainless Steel OCTG in Severe Corrosion Environments

11103 Environmental Cracking Performance of Super Martensitic Stainless Steels13Cr in High Chloride Reservoir Fluids Containing H2S/CO2

Association for Materials Protection and Performance