Realization of Synergism in Sodium Tungstate-Zn
نویسندگان
چکیده
The aim of this present work is to study, the corrosion behavior of carbon steel in well water in the presence of sodium tungstate (ST)-Zn 2+ -N-(phosphenomethyl) iminodiaceticacid (NPMIDA) solutions. Electrochemical studies and FTIR spectral studies and weight loss study have been employed. It was found that the inhibition efficiency (IE) of ST (50 ppm)-Zn 2+ (10 ppm) was improved from 8% to 82% by the addition of 150 ppm of NPMIDA. The protective film consists of Fe 2+ -WO4 2, Fe 2+ -NPMIDA complex on anodic site and Zn(OH)2 complex at cathodic site. The NPMIDA-ST-Zn 2+ system increases linear polarization resistance value, decreases corrosion current, increases charge transfer resistance and decreases double layer capacitance value. Based on the above results a mechanism of corrosion inhibition is proposed.
منابع مشابه
Biochemical and Histological Study of Protective Effect of Sodium Tungstate on Oxidative Stress Induced by Streptozotocin in Pancreas of Diabetic Rats
Purpose: The aim of this study was evaluation of effects of sodium tungstate on oxidative stress in pancreas of streptozotocin induced diabetic rats. Materials and Methods: Sixty mature Wistar male rats (Age: 2-3 month) were selected and divided into six groups randomly (n=10). Control (C), STZ-induced diabetic (D), STZ-induced diabetic rats were treated by sodium tungstate (1 mg/ml) in drinkin...
متن کاملBeta Cell Protective Effects of Sodium Tungstate in Streptozotocin-Induced Diabetic Rats: Glycemic Control, Blockage of Oxidative Stress and Beta Cell Histochemistry
Background: Diabetes is a major public health problem. The development of new therapies that are able to improve glycemia management and even to cure diabetes is of great interest. In this study, protective effects of sodium tungstate against STZ-induced beta-cell damages were investigated. Methods: Sixty rats were divided into six groups: control, diabetic, sodium tungstate treated diabetic r...
متن کاملEffect of composition electrolyte on the morphology and photocatalytic activity of anodized titanium nanoporous
The morphology of titanium dioxide and titanium dioxide-tungsten trioxide nanocomposite films fabricated by anodizing in a glycerol solution containing 0.13 M NH4F and different quantity of Na2WO4 was investigated as a function of sodium tungstate concentrations. The effects of sodium tungstate concentration on the surface morphology were observed by scanning electron microscopy (SEM). It was c...
متن کاملInteraction of rat liver glucocorticoid receptor with sodium tungstate.
Effects of sodium tungstate on various properties of rat liver glucocorticoid receptor were examined at pH7 and pH 8. At pH 7, [3H]triamcinolone acetonide binding in rat liver cytosol preparations was completely blocked in the presence of 10--20 mM-sodium tungstate at 4 degrees C, whereas at 37 degrees C a 30 min incubation of cytosol receptor preparation with 1 mM-sodium tungstate reduced the ...
متن کاملBiospeciation of tungsten in the serum of diabetic and healthy rats treated with the antidiabetic agent sodium tungstate.
It is known that oral administration of sodium tungstate preserves the pancreatic beta cell function in diabetic rats. Healthy and streptozotocin-induced diabetic rats were treated with sodium tungstate for one, three or six weeks, after which the species of W in serum, were analysed. An increase in serum W with treatment time was observed. After six weeks, the serum W concentration in diabetic...
متن کامل