Dentists make use of orthodontic wires such as SS 18/8, SS 316, Ni-Cr etc., to regulate the growth of teeth. In the saliva environment these wires undergo corrosion. Aside from this, they undergo corrosion by the food items, juices and Tablets orally in taken. Corrosion resistance of SS 18/8 alloy in artificial saliva (AS) , in the absence and presence of Digene Tablet juice, has been investigated by polarization and AC impendance techniques. It is inferred that corrosion resistance of SS 18/8 alloy in artificial saliva decreases in presence of Digene Tablet. This is exposed by decrease in Linear Polarization Resistance (LPR) value, Charge transfer resistance (Rt) value, in impedance value, and increase in corrosion current and double layer capacitance value(Cdl). In presence of Digene Tablet, the LPR value decreases from 3488228 to 1629535 Ohmcm2. The corrosion current value increases from 1.447 x10-8 to 2.637x10-8A/cm2 . The Charge transfer resistance (Rt) value decreases from 37796 to 10481Ohmcm2 . The double layer capacitance value increases from 1.349x10-10 F/cm2 to 4.866x10-10F/cm2. The impedance value decreases from 4.857 to 4.428. Hence it implies that people with orthodontic wire made of SS 18/8 alloy should avoid taking Digene Tablet juice orally.

Corrosion resistance of Ni-Ti alloy, 22 carat gold, SS 18/8 alloy, SS316L alloy, and thermoactive alloy in artificial saliva (AS) in the absence and presence of tea has been evaluated by polarization study, AC impedance spectra, UV-visible absorption and fluorescence spectra, SEM, AFM, and EDAX. For Ni-Ti alloy, 22 carat gold, SS 18/8 alloy, SS316L alloy, and thermoactive alloy, polarization study and AC impedance spectra lead to the result that the Ni-Ti alloy has more corrosion resistance. The decreasing order of the corrosion resistance for Ni-Ti alloy is AS + tea > AS > tea. People fixed with orthodontic wire, made of Ni-Ti alloy, can take tea orally without any hesitation. Linear polarization resistance, corrosion current, charge transfer resistance, double-layer capacitance, and impedance were utilized to evaluate the corrosion inhibition of the tea. UV-visible absorption spectroscopy (UV), fluorescence spectroscopy, scanning electron microscopic (SEM) studies, electron-dispersive X-ray spectroscopy (EDAX), and atomic force microscopy (AFM) give the evidence of better surface condition of the orthodontic wire.

Consumption of beer has become very common worldwide. Normally the available market beer is contained in bottles and tins. This occupies the considerable amount of space wherever it is being stored; also it weighs when being carried out from place to place. There are so many instant beverage powders with different flavors for soft drinks. This suggested the attempt to invent the instant beer powder that would be a boon to all the beer lovers. Hence in this article such, a novel initiative is attempted to bring forth the methods and means for the production of instant beer powder. Different methods of producing the same is promulgated, which surely would fulfill and shape the futuristic pattern of beer production and the beer consumers.

In day today life metals are used almost in all fields of technology and industries. Metallic corrosion is the progression of vicious attack on the metal surface through the contact with the environment. Corrosion is a natural deterioration progression which can be restricted but cannot be completely prevented. In past years, chemical inhibitors were used to control corrosion. Later it was found that the chemical inhibitors were dangerous and venomous. So eco-friendly, non–venomous chemical inhibitors were used. In recent days, green inhibitors from natural products have been used as inhibitors which are eco-friendly and completely non-hazardous were reported by (Kilbourn, 1985; Bethencour et al., 1998; et al., 2002). Arenas Drypetes sepiaria is a plant which belongs to the family ' . It is an evergreen tree Putranjivaceae (Euphorbiaceae)' commonly grown in foothills and shrub jungles which is widely distributed in Srilanka and some places of Tamil Nadu as reported in (Nganga et al., 2008). The objective of present determination was to evaluate the anticorrosion property of (DS) by the Drypetes sepiaria inhibition efficiencies of DS-Zn , DS-Zn Additives 2+ 2+

Objective: The ethanolic extract of was used as corrosion inhibitor on carbon steel in acidic medium. Drypetes sepiariaThe phytochemical screening, antimicrobial activity and GC-MS analysis of the plant extract were carried out.Material and Methods: The anticorrosion property of was determined by weight loss method, for Drypetes sepiaria various concentrations of the extract with Zn ion and tartaric acid, citric acid and lactic acid as additives in 0.5M HCl 2+ medium.The protective film that formed on the surface of the metal which resists the Results and Conclusion: corrosion was confirmed by the spectral studies such as FT-IR, UV and fluorescence spectra.The film formation is also confirmed by the surface morphology SEM analysis.This shows the complex formation between the metal cation, additive and the phytoconstituents present in the extract of Drypetes sepiaria.

The present study is to use 1-hydroxy ethylidene 1, 1-diphosphonic acid (HEDP) as corrosion inhibitor for aluminium in aqueous solution containing 60 ppm Cl- ion was chosen as the inhibitor. Zn2+ is selected as the synergist, as Zn2+ ions in association with HEDP inhibitor is considered environmental friendly inhibitor for aluminium corrosion in alkaline (pH=11) media. The environment chosen is aqueous solution containing 60 ppm Cl- ions. To investigate the nature of the protective film, surface analytical techniques such as, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) have been put to use in the present study. The formation of protective film has been confirmed using the electrochemical techniques such as polarization study and AC impedance spectral study. The above studies support the weight loss study.

The Inhibition efficiency (IE) of various concentrations of a SM(Sodium molybdate)-Zn2+-Aloe vera system in controlling corrosion of mild steel immersed in well water was evaluated by a weight–loss study. The formulation consisting of 100 ppm of SM and 25 ppm of Zn2+ and 10ml of aloe vera extract showed 97% IE. A synergistic effect was noticed between SM-Zn2+-Aloe vera system. In the presence of aloe vera, SM-Zn2+ system has excellent inhibition efficiency. Polarization studies reveal that SM-Zn2+-Aloe vera system functions as a anodic inhibitor. AC impedance spectra suggest that a protective film is formed on the metal surface. FTIR spectra reveal that the protective film consists of Fe2+-SM complex and Fe2+-Aloe vera complex and Zn(OH)2.

A solution route method was carried out for the synthesize of µ-peroxo-bis [aminebis (ethylenediamine) cobalt(III) ]perchlorate dihydrate.FT-IR and Electronic spectroscopic methods were used to characterize the synthesized complex.Biomimic oxidation of D-ribose by µ-peroxo complex has been studied kinetically in aqueous medium.Pseudo first order conditions has been followed to determine the rate of the reaction.The Oxidation reaction shows first order kinetics with respect to peroxo complex concentration and hydrogen ion concentration.The reaction rate points to negligible effect on increasing ionic strength.Potentiometric method was used to carry out the biomimic oxidation of the complex µ-peroxo complex.Thermodynamic and Arrhenius parameters were calculated and a plausible mechanism has been proposed.

The research of the present work was to investigate the removal of methylene blue dyes from aqueous solution by using Acid Activated Abutilon Indicum Leaves (AAAI).Generally, dyes are organic compounds used as colouring products in chemical, textile, paper, printing, leather, plastics and various food industries.The need for the treatment of dye contaminated waste water passed out from the industry.In this study, Abutilon Indicum Leaves were studied for its potential use as an adsorbent for removal of a cationic dye methylene blue.The various factors affecting adsorption, such as initial dye concentration, contact time, adsorbent dose and effect of temperature, were evaluated.The experimental data were fitted into the pseudosecond order kinetic model.The equilibrium of adsorption was modeled by using the Langmuir and Freundlich isotherm models.The objective of the present work suggests the AAAI may be utilized as a low cost adsorbent for methylene blue dye removal from aqueous solution.

An adsorbent prepared from Ipomoea carnea Leaves (AAIC), by acid treatment was tested for its efficiency in removing nickel ion. The process parameters studied include agitation time, initial Nickel ion concentration, adsorbent dose, pH and temperature. The adsorption followed second order reaction equation and the rate is mainly controlled by intra-particle diffusion. Freundlich and Langmuir isotherm models were applied to the equilibrium data. The adsorption capacity (Qm) obtained from the Langmuir isotherm plot at an initial pH of 6.5 and at 30, 40, 50, 60 ± 0.5 0C. The influence of pH on nickel ion removal was significant and the adsorption was increased with increase in temperature. A portion of the nickel ion was recovered from the spent AAIC using 0.1M HCl.

This study is concerned with the development of new ecofriendly inhibitor system which functions efficiently in the presence of additives such as biocides for the corrosion control of carbon steel in cooling water systems. The inhibition efficiency of sodium saccharin (SS)-Zn system in controlling corrosion of carbon steel in an aqueous environment has been evaluated by mass loss method. A synergistic effect is noticed between sodium saccharin and Zn. The effect of duration of immersion, influence of pH and the influence of biocides on the inhibition efficiency of the inhibitor system are studied. Polarization study and AC impedance spectral studies were carried out to find out the nature of the corrosion inhibitor The protective film formed on the metal surface has been analyzed by FT-IR, UV, SEM and AFM spectra. Based on the results obtained from the mass loss methods, polarization studies and surface analysis studies a suitable mechanism for the corrosion inhibition has been proposed.

The inhibition efficiency (IE) of trisodium citrate (TSC)-Zn 2+ system in controlling corrosion of mild steel in well water has been evaluated by weight loss method. A synergistic effect exists between TSC and Zn 2+ . The formulation consisting of 50 ppm of TSC and 25 ppm of Zn 2+ provides 87% of IE. FTIR spectra reveal that the protective film consists of Fe 2+ -TSC complex and Zn (OH) 2 . Polarization of study confirms the formation of a protective film on the metal surface .The inhibitor system controls the cathodic reaction predominantly

The corrosion inhibition efficiency of Isonicotinamide (ISN) in controlling the corrosion of carbon steel in one normal(1N) hydrochloric acid solution(HCl) in absence and presence of Zn 2+ has been studied by weight loss method. Weight Loss study reveals that the formulation consisting of 10 ppm of ISN and 10 ppm of Zn 2+ has 78% inhibition efficiency. The results of polarisation study shows that the formulation function controls the anodic reaction predominantly. The AC impedance spectra reveal that a protective film formed on the metal surface. FTIR spectrum reveal that the protective film consists of Fe 2+ -ISN complex on the anodic sites of metal surface and Zn(OH) 2 formed on cathodic sites of metal surface.

The corrosion inhibition efficiency of an aqueous extract of Aloe Vera (AV) in controlling the corrosion of carbon steel rain water in absence and presence of with Ni 2+ has been studied by weight loss method. Weight Loss study reveals that the formulation consisting of 5ml of AV and 50 ppm of Ni 2+ has 98% inhibition efficiency. The results of polarisation study shows that the formulation function controls the cathodic reaction predominantly. The AC impedance spectra reveal that a protective film formed on the metal surface. The UV – visible absorption spectra indicates the possibility of formation of Fe 2+ - AV complex and also Ni 2+ - AV complex in the solution. FTIR spectrum reveal that the protective film consists of Fe 2+ -AV complex and Ni (OH)2.

The inhibition and biocidal efficiency of sodium dodecyl sulphate (SDS) and calcium propionate (CP) in controlling corrosion of carbon steel immersed in an aqueous solution has been evaluated by weight loss and biocidal efficiency method in the absence and presence of Zn2+. The formulation consisting of CP and Zn2+ has excellent inhibition efficiency (IE). The biocidal efficiency of this formulation is 46 %. To improve the biocidal efficiency a third substance SDS is added. A synergistic effect is noticed between SDS, Zn2+ and CP. The formulation consisting 50 ppm of calcium propionate, 200 ppm of SDS and 50 ppm of Zn2+ shows 99 % IE and 100 % biocidal efficiency. Addition of SDS enhances the IE of Zn2+ and CP system. Electrochemical studies were carried out to find out the nature of the corrosion inhibitor. The CP–Zn2+–SDS system functions as a mixed inhibitor. The scanning electron micrographs and atomic force micrographs reveal the formation of a protective film on the metal surface.

The ultrafine neodymium nickelate (NdNiO 3) powders have been prepared by molten flux method using oxide precursors. The synthesized materials were characterised using XRD, FTIR, CHNS, EDAX and EPR analytical techniques. The morphology of the synthesized crystals were scrutinized using scanning electron microscopy (SEM). The XRD analysis has shown that the synthesized crystal has possessed cubic structure. FTIR spectrum exhibits the absorption bands for the Nd-O stretching vibration and Ni-O bands at different wave lengths. The CHNS analysis presents the impurities level in the synthesized compound. EDAX analysis gives the concentration of Nd, Ni and O ions in the compound. The lone pair of electron state is identified from the EPR spectrum. The SEM micrographs depicts the presence of fine crystallites with assorted morphology. The average particle size of the powders is ranging between 25-35 µm. From the above studies, it has been concluded that pure crystals of NdNiO 3 compound can be synthesized by low temperature molten salt technique.

Bis-(ethylene diamine),bis-(diethylene triamine)peroxo dicobalt(III) perchlorate complex is synthesized by solution route. The prepared m-peroxo complex is characterized by FT-IR and electronic spectroscopy. The biomimic kinetics oxidations of pyridoxine by peroxo complex have been studied in aqueous medium. The reaction is first order each in the concentration of peroxo complex and H+ concentration. Increase in ionic strength has no effect on the reaction rate. The reaction does not induce the polymerization of acryl amide. The main products of the reaction has been isolated and identified by the spot test. The Arrhenius and the thermodynamic parameters have been calculated from the effect of temperature on the reaction rate. A suitable mechanism has been proposed and the experimental result is derived.

Bis-(ethylene diamine) bis-(diethylene triamine) peroxo dicobalt(III) perchlorate complex is synthesised by solution route. The prepared mu-peroxo complex is characterised by FT-IR and electronic spectroscopy. The biomimic kinetics oxidation studies of L-leucine by mu-peroxo complex in aqueous medium have been investigated. The kinetics reaction follows the first order reaction with respect to peroxo complex concentration and hydrogen ion concentration. Increase in ionic strength has no effect on the reaction rate. The reaction does not induce the polymerisation of acrylamide. The main products of the reaction have been isolated and characterised. The Arrhenius and the thermodynamic parameters have been calculated from the effect of temperature on the reaction rate. A suitable mechanism has been proposed based on the experimental result.