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...

polymer-clay nanocomposite coatings have attracted much attention because of impressive enhancements of coating properties. in this research, both commercially available and isophoronediamine-modified montmorillonite clays were used to obtain epoxy-clay nanocomposite coatings. these nanocomposite materials with different clay loadings in the form of coatings were applied to cold-rolled steel (c...

Various tools were used in the investigation and analysis processes of iron window grille sabil Ramadan. Metallographic Microscope, SEM-EDS Carbon-Sulfur, XRD indicated that was manufactured from low carbon steel. X-ray diffraction corrosion products showed they mainly consist Magnetite Fe3O4, Goethite α-FeO(OH), Akaganeite β-FeO(OH). Such information regarding may assist conservation process t...

Hexagonal boron nitride (hBN) is a layered material with high thermal and chemical stability ideal for ultrathin corrosion resistant coatings. Here, we report the corrosion resistance of Cu with hBN grown by chemical vapor deposition (CVD). Cyclic voltammetry measurements reveal that hBN layers inhibit Cu corrosion and oxygen reduction. We find that CVD grown hBN reduces the Cu corrosion rate b...

In this study, nanoparticle zinc ferrites with different particle sizes were synthesized via sol-gel method using ferric nitrate and zinc nitrate. The obtained gel was dried and calcined at three different temperatures (i.e. 500, 600 and 800 °C) for 2 h. Adequate amounts of the as-synthesized nanoparticle samples were then added to the mixture of polyester resin and formaldehyde resin. The ...

To improve the corrosion protection of copper metal, 0.01M concentration of 1H-1,2,4-triazole-3-thiol (TAT) was incorporated into the hybrid sol-gel monolayers containing 3-glycidoxypropyltrimethoxysilane (GPTMS) and Tetraethoxysilane (TEOS). It was further subjected to hydrolysis and condensation reaction to form a sol-gel matrix. The TAT-doped hybrid sol-gel coating was applied over the c...

This study investigates the formation of a chromate conversion coating at Al-Cu-Fe-Mn intermetallic sites of an Al2219 alloy and the corrosion initiation at these sites in a 3.5 % NaCl solution, using SEM, AES and EDX. Changes in the surface chemistry were monitored after progressive exposures to the solution up to 42 hours. The coating was found to be thinner and more defective on the intermet...