... is determined using LPR and EIS. In this regard, both techniques reported very similar results. A kinetically easy reaction in which mass transfer acquires a leading role is the result presented in this analysis. ‡ Corresponding author. E-mail: [email protected] . 08 2008 02 2009...

... hydrogen sulfide corrosion kinetics mackinawite mechanism mechanistic model solid-state reaction Internal carbon dioxide (CO_{2) corrosion of mild steel in the presence of hydrogen sulfide (H2S) represents a significant problem for the oil and gas industry. ^1-7}...

...W. Sun; S. Nešić; S. Papavinasam Glass cell experiments were conducted to investigate kinetics of iron sulfide and mixed iron sulfide/carbonate layer formation in carbon dioxide/hydrogen sulfide (CO₂/H₂S) corrosion of mild steel using the weight change method. Scanning...

...W. Sun; S. Nešić Kinetics of iron carbonate layer formation in carbon dioxide corrosion has been investigated using a direct method—the corrosion layer weight-change method. The experiments were conducted in a glass cell at the temperatures from 60°C to 90°C, within an iron carbonate...

...L. Cáceres; L. Herrera; T. Vargas A study was made of the kinetic behavior of AISI 1020 (UNS G10200) carbon steel corrosion as carbon steel shavings were immersed in distilled water and aqueous 0.02-M and 0.1-M sodium chloride (NaCl) solutions. The rate of corrosion was determined from time profile...

...T.-S. Huang; G.S. Frankel The effects of temper and potential on localized corrosion kinetics of aluminum alloy (AA)7075 (UNS A97075) were studied using the foil penetration technique. Specimens were heat-treated to W, T6, and T7 tempers. Experiments were performed in sodium chloride (NaCl...

... and under the oxide layer. ‡ Corresponding author. E-mail: [email protected] . 08 2004 11 2004 NACE International 2005 alkali chloride biomass impactor kinetics thermophoresis Biomass-fired electric generating stations are becoming increasingly prominent in energy...

... aircraft lap joints instrumented with small profile fiber optic sensors. The sensors are able to differentiate between air, water, and CPC as the surrounding media. The sensors were used to monitor the local environment in situ in real time such that the penetration kinetics and water-displacing ability...

...%) than the alloy without nitrogen. Irrespective of their repassivation rate, the reformation of passive film occurred three steps with different kinetics. The film growth during the repassivation process was evaluated by the highfield ion conduction model. The beneficial effect of nitrogen...

...°C, and 70°C, up to 400 h. The measured weight loss and the degree of dissolution of each element (Si, Al, Mo, Y), analyzed in the solutions after the tests, indicate that the corrosion follows linear kinetics (i.e., the rate-controlling step is a chemical reaction). At each testing temperature...

...R. Godec; A. Petek; V. Dolec̆ek Kinetics of passive film formation on various martensitic stainless steels in solutions of three different pH values was studied by the potentiostatic step method. Experimental results for the current-time dependence can be explained theoretically by solving Fick’s...

... coupled with x-ray diffraction techniques were adopted to follow ferrite (α) transformation with subsequent formation of secondary austenite (γ₂) and sigma (σ) phase. The kinetic model of α transformation was interpreted in the form of an Avrami-type expression. The electrochemical...

... alloy 600 alloy 690 alloy 800 heat treatment kinetics passivation pH pitting potentiodynamic polarization scanning rate stress corrosion cracking sulfur transient current valence The present investigation was undertaken to determine effects of the valence of sulfur, in sulfur...

... the radioactivity collected downstream of the tube on a bed of granular magnetite. When logarithmic corrosion kinetics were assumed, the release was described very well by a mathematical model that assumes competition for the radiotracer between incorporation in the oxide precipitating on the tube surface and mass...

... at two fixed inhibitor concentrations. Data were compared and fitted to a published kinetic-thermodynamic model. Results were compared with fits obtained from application of Langmuir, Frumkin, and Flory-Huggins isotherms. Results also were correlated to the chemical structure of the inhibitors...

... or surface film repassivation kinetics improved resistance to IGSCC. The oxide rupture strain of type 304L (UNS S30403) stainless steel (SS) increased up to a factor of two in deaerated and 200 ppb oxygenated, high-purity water (< 0.08 μS/cm [0.20 μS/in.] outlet) after exposure to Zn concentrations up...

... K02800), A588 (UNS K11430), and SM (designated name) steels. Thermogravimetric analyses for 24 h revealed the kinetics of oxidation for the steels studied were linear in air and in pure O2 in the initial 0.5 h. This was followed by a transient kinetic pattern between linear and parabolic. Similar...

... of the corrosion kinetics of the embedded steel. Corrosion of steel in atmosphere and in concrete in an active state conformed to a semi-logarithmic relationship between I_corr and the relative humidity (RH) of the atmosphere or the degree of pore saturation of the concrete. The latter variable dictated...

... of Fe₂O₃ was identified on the sample surface. NACE International 1992 heavy brine iron corrosion kinetics Very concentrated zinc halide solutions are used by the petroleum industry to produce high-density solutions that are used as packer fluids in the oil industry. ^1-3...

... chlorides. Thermogravimetric techniques have been used for establishing the kinetics of corrosion in the gaseous medium whereas electrochemical techniques have been applied in the case of the aqueous medium. Studies in the aqueous medium have been extended to pressures as high as 2000 psi. In gaseous...