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Tungsten Inert Gas welding (TIG) is preferred in the Aerospace Industry where thin sections have to be welded with quality and precision. But, when thick sections are to be welded, conventional TIG welding is not usually preferred due to low penetration depth necessitating more passes. Activated flux Tungsten Inert Gas (A-TIG) welding was invented to improve productivity when welding thick sections. This study reviews the effects of using oxide fluxes in the A-TIG welding.

An experimental study to measure the evaporation rates, engine performance and emission characteristics of cotton seed biodiesel (cotton seed oil methyl ester) and its blends in different volumetric proportions with diesel is presented. The thermo-physical properties of all the fuel blends have been measured and presented. Evaporation rates of neat cotton seed biodiesel, neat diesel and their bends have been measured under slow convective environment of air flowing with a constant temperature. Evaporation constants have been determined by using the droplet regression rate data. The neat fuels and fuel blends have been utilized in a test engine with different load conditions to evaluate the performance, combustion and emission characteristics of the fuels. The specific fuel consumption values of the two blends, viz. B25 and B75 are found to be same. At the highest load, B0 records the lowest CO volume followed by B100. From the observed evaporation, performance and emissions characteristics, it is suggested that a blend of B50 and B75 can be optimally used in standard diesel engine settings.

In order to degrade the waste dyes, a nanocomposite thin film based on Zinc oxide nanoparticles (ZnONP) and conducting polymer was synthesized by adopting simple ionic layer adsorption reaction( SILAR) method. ZnO was synthesized via green synthetic method by employing cucum sativa fruit pulp an environmental friendly biosolvent which acts as reducing and capping agent. Characterization of the ZnONP reveals enhanced crystallinity, spherical morphology and low bandgap which has a higher influence in the Photoluminescence(PL) quenching of the nanocomposite thin film. The antibacterial activity was performed for green synthesized ZnONP which exhibited better activity due to the presence of oxygen interstitials. ZnO/NaI-PPy thin film exhibited higher conductivity than ZnO/PPy thin film due to the higher mobility of NaI and charge transfer mechanism. The oxygen interstitial in ZnONP is responsible for the reduced PL intensity in nanocomposite thin film. The photocatalytic property of the nanocomposite thin film was evaluated using the degradation of rhodamine 6g dye under visible light. The photocatalytic reaction of the ZnO/NaI-PPy nanocomposite thin film in visible light is 65% higher than that of pure NaI-PPy thin film catalyst.