The nitrogen-bearing alloys (alloy 33 and alloy 24) and stainless steel type 316L were used in this investigation in order to study the effect of alloying elements on electrochemical behavior and on the nature of passive film in seawater. Scanning electron microscopic studies were carried out to identify the pit morphology of the alloys. Surface analysis of the alloys by x-ray photoelectron spectroscopy after passivation showed that nitrogen and chromium are enriched at the surface of the passive film.IKeywords microscopy, x-ray photoelectron spectroscopy 1 alloy 24, alloy 33, passive film, scanning electron
Potentiodynamic anodic polarisation measurements have been carried out on type 316LN. RAJENDRAN stainless steel (as a reference material) and on alloys 33 and 24 in a simulated ue gas G. LATHA desulphurisation environment in order to assess the localised corrosion resistance. T he S. RAJESWARI results showed that the pitting corrosion resistance was higher in the case of alloys 33 and 24 than in the reference material owing to the higher contents of nitrogen, chromium, and molybdenum. A n accelerated leaching study conducted on the alloys 33 and 24 showed only minor tendencies for the leaching of metal ions at various impressed potentials. Observations by SEM con rmed the lower tendency towards pitting of the alloys 33 and 24.
Corrosion control in cooling systems where seawater forms the coolant is primarily effected with inhibitor additions. Deals with the evaluation of non‐ionic surfactants as corrosion inhibitors in seawater, on conventionally used type 316L SS. Potentiodynamic anodic cyclic polarization studies were carried out to evaluate the performance of non‐ionic surfactants. Emphasizes the role of these compounds as effective inhibitors focusing on the chemical behaviour and nature of chemisorption, influencing the inhibiting properties.
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