...Kyono Yasuda; Nobuyuki Ishikawa; Taishi Fujishiro; Takuya Hara; Eiji Tada; Mitsuo Kimura NACE MR0175/ISO 15156 provides the severity of a sour environment defined as a function of pH and H₂S partial pressure for sulfide stress cracking. Although hydrogen-induced cracking (HIC) is also...

... on the experimental results of sulfide stress cracking (SSC). However, the severity map obtained from SSC test results cannot be applicable to the hydrogen-induced cracking (HIC) susceptibility. In this study, the hydrogen permeability and crack area ratio of HIC under various pH and H₂S partial pressures...

... Magnox is currently stored in cooling ponds, pending final disposal. The corrosion resistance of Mg and its alloys is relatively poor compared to modern cladding materials, such as zirconium alloys, so it is important to have a knowledge of the chloride concentration/pH dependence on breakdown...

...Lawrence Onyeji; Girish M. Kale The corrosion behavior of three new-generation microalloyed steels in CO₂ saturated brine at different pHs and temperatures was investigated using electrochemical measurements such as linear polarization resistance (LPR), Tafel polarization...

...Andreas Junker Olesen; Lars Vendelbo Nielsen; Per Møller This paper investigates the possible alternating current (AC) corrosion mechanism as dihypoferrite dissolution at high pH under an alternating voltage perturbation and compares polarization behavior of three commonly used pipeline steels, X52...

... of aerated humid vapor could lead to the formation of nitric acid condensed in limited volumes of water on the container surface. The evolution of the corrosion processes under these conditions have been studied using pH measurements in limited volumes of water containing various concentrations of nitric...

...Alberto Keitelman; M. Graciela Alvarez The localized acidification mechanism for stable pitting growth was the result of pitting research performed by many investigators, led by Galvele. The main point of the mechanism is that a localized pH drop on the anode surface is a necessary condition...

...J. Abda; H. Davies; G. Hinds; A. Turnbull Materials selection is critical in the oil and gas industry, and pH has conventionally been a key parameter in the definition of appropriate qualification test conditions (e.g., in pH-H₂S domain diagrams). Modeling of the chemistry of oilfield...

...N.W. Khun; G.S. Frankel Carbon steel substrates were pretreated in a hexafluorozirconic acid-based solution for different durations. The corrosion resistances of the pretreated steel substrates in 0.5 M Na₂SO₄ solutions with different pH values were measured using several...

... to water lead contamination (low CSMR water). Longitudinal water pH measurements along the length of the galvanic rigs revealed a significant pH drop close to the lead:copper junction at relatively short stagnation times in high CSMR water, which is consistent with the observations of higher lead leaching...

... brines, without H₂S or CO₂. The separate and combined effects on the corrosion rate of the corrosion product layers, and of the brine temperature, pH, and oxygen presence were investigated. After measuring the corrosion rate in each environment, mathematical models were proposed...

...S. Thomas; N. Birbilis; M.S. Venkatraman; I.S. Cole Anodic and cathodic polarization of zinc was carried out in 0.1 M sodium chloride (NaCl) solution with pH ranging from 1 to 13. The electrochemical data was then contrast to thermodynamic chemical equilibrium diagrams. The analysis shows...

...C.K. Nguyen; B.N. Clark; K.R. Stone; M.A. Edwards Effects of chloride, sulfate, and alkalinity on galvanic corrosion were investigated using beaker tests, lead wire electrochemical tests, and lead solder galvanic cells. At relatively high concentrations of lead and low pH values that might...

...G. Hinds; P. Cooling; A. Wain; S. Zhou; A. Turnbull To resolve reported discrepancies between pH values of concentrated brines measured in the laboratory and those predicted by thermodynamic models, extensive measurements have been carried out to compare the performance of several different types...

...M.J. Muñoz-Portero; J. García-Antón; J.L. Guiñón; V. Pérez-Herranz Pourbaix diagrams (electrode potential-pH diagrams) for the Ni-Br^–-H₂O system at 25°C were developed in 400-g/L, 700-g/L, and 850-g/L (4.61-M, 8.06-M, and 9.79-M) lithium bromide (LiBr) solutions, which...

... International 2005 Two 30-day tests were carried out, with the details of the apparatus and test conditions primarily as described elsewhere. ⁶ The distinctive feature is the use of ASTM seawater at pH 8.2, ⁷ without heavy metal additions, in the charging cell. The applied...

... emphasis on the determination of the effects of bulk levels of pH, chlorides, and oxygen, at constant crevice geometry frequently applied in experimental work with a remote crevice assembly (RCA). As a result, increasing chloride contents, bulk oxygen levels, and decreasing pH reduce the calculated...

... at various concentrations and the effect of exposure time and pH of the solution were evaluated. The proposed mechanism of inhibition by TGA considers the complexity of experimental data obtained by various techniques. This mechanism is discussed in terms of adsorption, protective film formation...

...J.-G. Kim; Y.-S. Choi; J.-H. Yeo; S.-K. Kim; Y.-J. Kim; J.-H. Joo Corrosion properties of Mg-4Ni-xAl alloys were investigated using electrochemical techniques, pH measurement, hydrogen evolution test in acid-chloride solution (pH 5.4, 200 ppm Cl⁻), and surface analysis. The Mg-4Ni-xAl...

...J.-G. Kim; Y.-S. Choi; H.-D. Lee; W.-S. Chung The aqueous corrosion characteristics of a carbon steel (CS) coupled to Type 304 (UNS S30400) stainless steel (SS) were studied in deaerated alkaline-chloride solutions with velocity (0, 0.2, 0.4, and 0.6 m/s), pH (8, 9, and 10), and temperature (25, 50...