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Direct Analysis in Real Time Mass Spectrometry (DART-MS) is an ambient atmosphere mass spectrometry technique. Two concrete topical treatments were studied. One is a penetrating silane sealer. The other is a pure migrating inhibitor topical product.
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Dental implants are exposed to a wide range of pH values of saliva and different concentrations of fluoride. In this study, the effects of fluoride concentration and pH value on the corrosion behavior of Nb-10Ta-1Re and Ti-6Al-4V alloys in artificial saliva at 37°C were investigated by electrochemical measurements.
Corrosion in modern paper mills accounts for 30+% of maintenance expenses. Molecular microbiological methods (MMM): • Quantitative polymerase chain reaction (qPCR) and QuantArray were employed to examine MIC at four paper mills each with unique process characteristics and construction materials in the affected areas.
Biocorrosion or microbiologically influenced corrosion (MIC) is a major problem in the oil and gas industry. Biofilms are the culprits of MIC. In this work, D-amino acids were used to enhance two biocides, alkyldimethylbenzylammonium chloride (ADBAC) and tributyl tetradecyl phosphonium chloride (TTPC), to treat a field biofilm consortium on C1018 carbon steel coupons.
This study focuses on a better understanding of significant pitting corrosion on coating surface damaged carbon steels, or low alloy steels, during salt spray testing for automotive applications. Anodic cyclic polarization test was used to evaluate the severity of pitting corrosion, and to estimate the corrosion rate of raw materials.
Experiments were conducted at a range of temperatures (80 to 170°C) and at vapor pressure at 80°C to 3000 psi at 170°C to review the impact of temperature (and pressure) on three dissolvers. This paper shows that at elevated temperature the classic alkali sulphate dissolver (DTPA) dissolution performance declines significantly at 170°C.
Encapsulation of Linseed Oil & Tung Oil in urea-formaldehyde shells was performed using in-situ polymerization technique. Thin film self-healing coatings with uniform and quick self-healing ability were achieved with microcapsules at concentration of 3 wt%. Anti-corrosive performance was evaluated using immersion test & electrochemical impedance spectroscopy (EIS).
The corrosive effects of iron monosulfide deposited on carbon steel surfaces were investigated in autoclave experiments. The H2S and CO2 partial pressures were 1 to 20 bar. Temperatures were 10-120 °C. The test solutions consisted of high-salinity brine and low-salinity condensed water. Typical duration was 14 days. Weight loss and localized corrosion data were obtained.
The effect of Tungsten (W) and Molybdenum (Mo) on the corrosion behavior of low alloy steels exposed to acid humidity corrosion environment containing O2, H2S, and CO2 was investigated using weight loss, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements.
Hydrogen Induced Cracking (HIC) can be a major issue for line pipe exposed to sour environments. In this study, influence of the test solutions on HIC evaluation was investigated from the view point of corrosion. Electrochemical measurements were employed to compare corrosion behavior of line pipe steels between the 0.93N acetate buffer solution and the conventional 0.05N acetate solution.
The internal corrosion of pipeline steel in the presence of hydrogen sulfide (H₂S) represents a significant problem in oil and gas industry. In the present study, experimentation was conducted to better resolve the direct reduction of H₂S while minimizing the effect of the anodic reaction by using a passive stainless steel working electrode.
This paper focuses on short-term oxidation testing (1,000 hours) of Ni- and Fe based heat-resistant alloys in flowing air with varying cycle frequencies (1, 10, and 168 hours) at 982 °C. The alloys tested were ranked based on weight change behavior and metal recession measurements.