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Electrochemical behavior of API X-80 steel materials in 3.5% wt. of NaCl solution containing different concentrations of H2S at different temperatures was studied. Potendiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were used to characterize the corroded API X-80 steel surface.
The electrochemical behavior of API X-80 steel materials in 3.5% wt. of NaCl solution containing different concentration of H2S at different temperatures was studied. Potendiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were employed to characterize the corroded API X-80 steel surface. The result showed that the corrosion rate of API X80 steel materials increased with increasing temperature. Pitting was observed at lower temperatures, while cracks and sulfide layers were observed on the corroded steel surface as the temperature was increased. Displacement of Fe-oxide film with a non-protective iron sulphide film was found to be responsible for the pitting and corrosion of the API X-80 steel materials.
Key words: downloadable, Temperature, hydrogen sulfide, API X80, corrosion, sulfide corrosion cracking
This study presents an overview of a number of factors influencing the pitting corrosion of Ti in aggressive environments. Effects of temperature and metal cations on pitting corrosion of Ti.
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Resistance of S30400 and S31600 SSs to chloride-induced crevice corrosion was assessed in a wide range of temperatures and chloride concentrations. Repassivation potential of S30400 SS decreased with increasing chloride & temperatures from 0 to 60ºC, and it a constant value in the range from 60 to 90ºC regardless of chloride.
Recycled water quality must be evaluated to determine its potential impact on the equipment the cooling water contacts. This paper identifies the impact of various recycled water ingredients that could either be harmful or beneficial to the equipment the cooling water contacts. Case histories. Guidelines.