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The effectiveness of aminotrimethylidene phosphonic acid (ATMP) as a corrosion inhibitor in association with a bivalent cation like Zn 2+ and nonionic surfactant like polyoxyethylene sorbitan monooleate (Tween 80) were investigated by measuring corrosion losses using electrochemical techniques. The corrosion of 304 stainless steel in the ground water medium was inhibited by complexation of the inhibitor. A combined inhibition effect was achieved by adding both ATMP and Zn 2+ along with Tween 80. The formulation functioned as a mixed type inhibitor. The synergistic effect of the inhibitor compound is calculated. Luminescence spectra, FTIR spectra, XRD, XPS and scanning electron microscopic studies were carried out to understand the mode of corrosion inhibition and also the morphological changes on the metal surface.

3,5-Diamino-1,2,4-triazole Schiff base derivatives and their inhibition efficiency, based on the effect of changing functional groups, were reported to establish a relationship between inhibitor efficiency and molecular structure using weight loss method, electrochemical and Fourier transform infrared spectral techniques. It was found that the molecules containing more electron donating groups have higher inhibition efficiency than the corresponding compounds with low electron donating groups.The results indicate that the order of inhibition efficiency of the triazole and its Schiff bases in solution and the extent of their tendency to adsorb on mild steel surfaces are as follows: vanilidine 3,5-diamino-1,2,4-triazole [ furfuraldine 3,5-diamino-1,2,4-triazole [ anisalidine 3,5-diamino-1,2, 4-triazole [ 3,5-diamino-1,2,4-triazole.

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Hydroxyapatite (HAP) is the most suitable nontoxic, biocompatible material increasingly used for bone implant coatings. However, its brittle nature is a major obstacle for such applications and this leads to the focus on developing composite coatings with the incorporation of various biopolymers and reinforcing material. In this study, mineral-substituted hydroxyapatite (M-HAP) and carboxymethyl chitosan (CMC), a biopolymer, are made into a composite (CMC/M-HAP) for enhanced biological properties of HAP. Furthermore, carbon nanotubes (CNTs) are incorporated in the composite to improve the mechanical and anticorrosive properties of HAP. The present work investigates the development of CNTs/CMC/M-HAP composite coating on piranha-treated Ti-6Al-4V alloy for improved biological and mechanical properties, which is anticipated to be the most suited alternative material for orthopedic implants.

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The corrosion and corrosion inhibition of mild steel in groundwater using 1-(2-pyrrolecarbonyl)-benzotriazole (PBTA) and 1-(2-thienylcarbonyl)-benzotriazole (TBTA) with 2-phosphonoacetic acid (PAA), 4-phosphonobutyric acid (PBA), and Zn2+ at various temperatures ranging from 30 to 60 °C were reported. The study was performed using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) along with X-ray diffraction (XRD) and Scanning electron microscopy (SEM) investigations. PDP measurements proved that the presence of inhibitors decreases the corrosion of still by decreasing its corrosion current density. EIS data showed that the charge transfer resistance of steel increases in the groundwater containing inhibitors. XRD and SEM investigations confirmed that the inhibition of mild steel is achieved by the adsorption of the inhibitor molecules on the steel surface. All results indicated that the presence of PBTA and TBTA along with Zn2+ as well as PBA offered good inhibition efficiency against corrosion of mild steel in the groundwater media.