Effect ofpHand H₂S concentration on sulfide stress corrosion cracking (SSCC) of API 2205 duplex stainless steel

Abstract

Effect of pH and H 2 Sc oncentration on sulfide stress corrosion cracking( SSCC) of API 2205 duplex stainless steelThe role of pH value and H 2 Sconcentration on the sulfide stress corrosion cracking of API 2205d uplex stainless steel was studied by means of slow strain-rate tests, polarization curve measurements and surface analysis. It was found that 2205 duplex stainless steel was highly susceptible to sulfide stress corrosion cracking as pH decreased and H 2 Sc oncentration increased.W hent he pH valuew as 2.8, the susceptibility stayed at al ow level in 500 ppm H 2 Sc oncentration but there existed ac ritical H 2 Sc oncentration between 500 ppm and 1000 ppm, above which the susceptibility rapidly increased.T he sulfide stress corrosion cracking resulted from hydrogen-induced cracking and exhibited the characteristics of hydrogen embrittlement. The boundary of a phase and c phase promoted the initiation of stress corrosion cracking, while c phase inhibited its propagation.R. Liu et al.: Effect of pH and H 2 Sc oncentration on sulfide stress corrosion cracking (SSCC) of API 2205 DSS Int.

Addressing Hydrogen Sulfide Corrosion in Oil and Gas Industries: A Sustainable Perspective

“…Recent research by Liu et al [86] further supports the significance of pH in influencing corrosion susceptibility. In low-pH solutions with H 2 S, the passive film on the metal is quickly disrupted by H + and Cl − ions generated during cathodic reactions, leading to hydrogen diffusion into the metal and promoting corrosion.…”

“…H 2 S acts as both the source of hydrogen for corrosion and a poisoning agent for hydrogen absorption, underscoring the role of H + in determining hydrogen generation and concentration on the metal surface. The decrease in pH at the crack tip during crack propagation enhances HE, accelerating corrosion [86].…”

“…In environments with consistent pH levels, higher concentrations of H 2 S lead to decreased elongation and strength, indicating an increase in susceptibility to corrosion. This effect is primarily due to the corrosive nature of H 2 S itself [86]. Moreover, the concentration of H 2 S directly affects the corrosion rate of carbon steel, with elevated concentrations correlating with higher levels of corrosion.…”

Effect of Service Environmental Parameters on Electrochemical Corrosion Behavior of L80 Casing Steel

“…Casing is the key structure that supports the structural stability and safety of an oil well, and its integrity determines its lifespan. Controlling stress corrosion is important to maintain the safe and stable production of oil wells [ 4 , 17 ]. In the annulus of an oil well, some oil films and scale layers are found on the surface of casing steel because of the presence of mineralized water and a small amount of infiltrated crude oil, which slows down the uniform corrosion to a certain extent [ 18 , 19 , 20 ].…”

Corrosion Behavior of 2205 Duplex Stainless Steels in HCl Solution Containing Sulfide

“…The effect of single chloride or sulfide on corrosion of DSS has attracted many attentions [12][13][14][15][16][17] because both of them can affect the stability of passive metal significantly. For instance, Jeon et al [12] focused their study on pitting corrosion of DSS in NaCl and NaCl + HCl solutions.…”