The electrochemical behavior and passive film properties of Hastelloy C22 alloy, laser-cladding coating, Ti–6Al–4V alloy in sulfuric acid dew-point corrosion environment were investigated through a combination measurements surface analyses. coating exhibited similar passivation repassivation without pitting corrosion, resulting from with bilayer structure consisting Cr2O3-dominated compact inne...

This paper reports nano-structured SiO2-TiO2 coatings using the sol-gel technique on 316L steel substrates. Nanoindentation, surface analysis and corrosion resistance tests were performed on different samples. The nanomechanical tests allowed to compare uncoated steel samples (Eavg = 193.24 GPa and mean hardness of 2.63 GPa and coated steel samples (Eavg = 287.38 GPa and mean hardness of 5.74 G...

y-tial intermetallic alloy have a good potential for use as biomaterial, due to its good corrosion resistance. in this paper, two fundamental electrochemical techniques namely electrochemical impedance spectroscopy and potentiodynamic anodic polarization were used to evaluate the corrosion performance of g-tial in ringer's solution. surface modification treatments were employed with the pu...

The corrosion resistance of solution annealing heat-treated type 2205 duplex stainless steel microstructures was assessed with a bipolar electrochemistry technique. Chemical element partitioning in both crystallographic phases correlated to simulations critical pitting temperatures. as-received microstructure had the highest pit nucleation resistance, high-temperature treatment revealing reduce...

In this paper we utilize Support Vector Machines to predict the degradation of the mechanical properties, due to surface corrosion, of the Al 2024-T3 aluminum alloy used in the aircraft industry. Precorroded surfaces from Al 2024-T3 tensile specimens for various exposure times to EXCO solution were scanned and analyzed using image processing techniques. The generated pitting morphology and indi...

The 7xxx-series aluminum alloys are widely used in aircrafts due to their superior performance. evolution of the mechanical properties caused by marine atmospheric corrosion has become a research hotspot increase aircraft service time environment. In this work, 7B04-T74 alloy was studied an alternate immersion test. surface microstructure analyzed SEM, EDS, XRD, and OM. influence on tensile fat...

Pitting corrosion was observed on a high purity Fe-17Cr alloy in 0.02M NaCl solution of pH 6.6 at high anodic potential (+ 550 mVISCE). Potentiostatic electrochemical noise measurements were performed, revealing the presence of a characteristic current noise below stable pitting, differing strongly from that observed 011 a series of AISI 430 type 17% Cr stainless steels, with respect to the fre...