Abstract FeCo alloys are important materials used in pumps and motors the offshore oil gas drilling industry. These subjected to marine environments with a high NaCl concentration, therefore, corrosion catastrophic failure anticipated. So, surface dissolution of additively manufactured samples is investigated quasi- situ manner, particular, pitting 5.0 wt pct solution. The local same sample reg...

The erosion–corrosion behavior of 90/10 and 70/30 copper–nickel tubes was investigated by in situ electrochemical tests on a self-built loop apparatus ex surface characterization. corrosion product film that formed at 1.5 m/s for the tube 0.5 showed best resistance. For tube, continuous existed below 3 mainly inhibited cathodic reaction. range 0.5–4.7 more similar to typical passive electrochem...

This work shows the preparation of silica membranes by a two-step sol-gel method using tetraethyl orthosilicate in ethanolic solution by employing nitric acid and ammonia as co-catalysts. The sols prepared in pH 6 resulted in the lowest concentration of silanol (Si-OH) species to improve hydrostability and the optimized conditions for film coating. The membrane was tested to desalinate 0.3-15 w...

Pure cobalt coatings were electrodeposited on copper substrate by means of direct electric current in a chloride solution at different current densities in the range of 10-70 mA cm -2 . The surface morphology and microstructure were investigated via X-ray diffraction analysis and scanning electron microscopy. Corrosion behavior of cobalt coatings was also studied in a 3.5 wt% NaCl soluti...

Cr2O3 coatings were deposited on carbon steel through the flame spraying technique using two types of flames (neutral and oxidizing). The protective morphological characteristics determined. had layer thickness values 114 214µm for oxidizing neutral samples, respectively. Porosity percentages 4.5 % 2.5 determined, where sample presented greatest porosity due to insufficient fusion oxide particl...