Influence of dipinaconborates on the corrosion resistance of ST3 steel in synthetic detergent solutions

2021 ◽  
pp. 131-134
Author(s):  
I.A. Strel’nikov ◽  
D.A. Pestryaev ◽  
Sh.V. Sadetdinov
Keyword(s):  
Experimental Data ◽  
Corrosion Resistance ◽  
Aqueous Solutions ◽  
Synthetic Detergent ◽  
Solution Temperature ◽  
Anode Current Density ◽  
Anode Current ◽  
Degree Of Protection ◽  
St3 Steel ◽  
Corrosion Electrochemical Behavior

Experimental data on the effect of lithium dipynaconborates (DPKBL), sodium (DPKBN) and potassium (DPKB) on the corrosion resistance of St3 steel in 3 % aqueous solutions of Labomid-203, MS-8 and Temp-100A synthetic detergents have been obtained. By measuring the stationary potentials of steel in solutions of synthetic detergents, the optimal concentration of dipinaconborates was revealed, which is 20 g/l, at which the highest corrosion resistance of steel is achieved. Studies of the corrosion-electrochemical behavior of St3 steel in 3 % aqueous solutions of Labomid-203, MS-8 and Temp-100A detergents showed that in the presence of dipinaconborates, the anode current density, at the same potentials, is much lower, and the passivation region is larger. than in CMC solutions. It was found that the corrosioninhibiting ability of dipinaconborates in CMC solutions increases in the series DPKBL < DPKBN < DPKBK, and potassium dipinaconborate has the greatest anticorrosive property. Dipinaconborates reduce the corrosion rate of steel at a washing solution temperature of 80 °C, the degree of protection is in the range from 71.4 to 90.6 %. And the braking coefficient is from 3.6 to 10.4. By analyzing the obtained experimental data, it was concluded that dipinaconborates increase the corrosion resistance of St3 steel and can be recommended as an anticorrosive additive to synthetic detergents.

Study of Corrosion-Electrochemical Behavior of Aluminum-Beryllium Alloys Alloyed with Yttrium, Lanthanum and Cerium

2012 ◽  
Vol 510-511 ◽  
pp. 233-240
Author(s):  
A.S. Safarov ◽  
T.D. Dzhuraev ◽  
M.I. Halimova ◽  
Z.M. Karieva
Keyword(s):  
Experimental Data ◽  
Corrosion Resistance ◽  
Electrochemical Behavior ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical Chemical ◽  
Foundry Alloys ◽  
Physical And Chemical ◽  
Corrosion Electrochemical Behavior ◽  
And Chemical Properties

Advantage of alloys on the basis of system Al-Be,Al-Be-REM is raised technological, physical, chemical and corrosion resistance properties in damp and excessively aggressive atmospheres [. According to literary reviews, this alloys basically are foundry-hypoeuthectic and hypereuthectic, and the technology of moulding of these alloys very difficult and demands application of operations modifying. Difficultly deleted impurity basically (Fe), specifically influence phase structure, naturally influencing on physical and chemical properties industrial silumines with the maintenance not less than 0.4-0.5 %. Many additives as Fe, Mg, Ti, Be, especially in hypoeuthectic silumines increasing strength and foundry properties, can reduce them corrosion-resistance. In connection with the above-stated is of interest researches of influence of impurity such elements as, Be and REM on corrosion resistance industrial alumines. Studies corrosion-resistance spent samples potentiostatic a method on device " Potentiostate P-50" with a registering recorder in the environment of the muriatic solutions in a mode "Potential". he analysis of experimental data have shown, that addition Be, positively modifying structure of foundry alloys, reduces influences containing in it Fe, increases strength and corrosion resistance, which calculations testify experimental data of electrochemical indicators [2,3].

Influence of anode current density on carbon parasitic reactions during electrolysis

2021 ◽  
Author(s):  
Tongxiang Ma ◽  
Lang Zhao ◽  
Yu Yang ◽  
Liwen Hu ◽  
Shengfu Zhang ◽  
...  
Keyword(s):  
Current Density ◽  
Anode Current Density ◽  
Anode Current

scholarly journals Experimental data on the removal of acid orange 10 dye from aqueous solutions using TiO2/Na-Y zeolite and BiVO4/Na-Y zeolite nanostructures: A comparison study

Data in Brief ◽  
2021 ◽  
Vol 35 ◽  
pp. 106869
Author(s):  
Behzad Rahimi ◽  
Nayereh Rezaie-Rahimi ◽  
Negar Jafari ◽  
Ali Abdolahnejad ◽  
Afshin Ebrahimi
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Comparison Study ◽  
Y Zeolite ◽  
Acid Orange ◽  
Acid Orange 10

scholarly journals Effect of Fluid Flow on the Corrosion Performance of as-Cast and Heat-Treated Nickel Aluminum Bronze Alloy (UNS C95800) in Saline Solution

2021 ◽  
Vol 2 (1) ◽  
pp. 61-77
Author(s):  
Hamid Reza Jafari ◽  
Ali Davoodi ◽  
Saman Hosseinpour
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Flow Rate ◽  
Solution Temperature ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Nacl Solution ◽  
Flow Conditions ◽  
Heat Treated ◽  
Nickel Aluminum Bronze

In this work, the corrosion behavior and surface reactivity of as-cast and heat-treated nickel aluminum bronze casting alloy (UNS C95800) in 3.5 wt% NaCl solution is investigated under stagnant and flow conditions. Increasing flow rate conditions are simulated using a rotating disk electrode from 0 to 9000 revolutions per minute (rpm). Optical micrographs confirm the decrease in the phase fraction of corrosion-sensitive β phase in the microstructure of C95800 after annealing, which, in turn, enhances the corrosion resistance of the alloy. Electrochemical studies including open circuit potentiometry, potentiodynamic polarization, and electrochemical impedance spectroscopy are performed to assess the effect of flow rate and heat treatment on the corrosion of samples at 25 and 40 °C in 3.5 wt% NaCl solution. For both as-cast and heat-treated samples, increasing the flow rate (i.e., electrode rotating rate) linearly reduces the corrosion resistance, indicating that the metal dissolution rate is significantly affected by hydrodynamic flow. Increasing the solution temperature negatively impacts the corrosion behavior of the as-cast and heat-treated samples at all flow conditions.

Increasing of Corrosion Resistance for Metal Products of Livestock Premises

2021 ◽  
Vol 316 ◽  
pp. 758-764
Author(s):  
M.Yu. Karelina ◽  
S.M. Gaidar ◽  
D.I. Petrovskiy
Keyword(s):  
Corrosion Resistance ◽  
Low Carbon Steel ◽  
Industrial Complex ◽  
Low Carbon ◽  
Inhibitor Concentration ◽  
Complex Action ◽  
Protection Efficiency ◽  
Degree Of Protection ◽  
Metal Products ◽  
Increase Corrosion Resistance

The purpose of the work was to identify and analyze the causes of corrosion destruction of metal products, used in conditions of animal keeping on farms of the agro-industrial complex, and to find effective methods of combating it. In order to increase corrosion resistance of metal products of livestock farms and complexes, it is proposed to use the developed preparation, which has fungicidal and anticorrosive properties simultaneously. The rate of metal products corrosion during the experiment was evaluated by the museum strain of Aspergillus niger fungi. The article describes the causes of fungal corrosion, the principle of its effect on metals; proposes an inhibitor of complex action for the control of electrochemical and bio-corrosion. The protection efficiency of metal products by the inhibitor was evaluated by the corrosion braking coefficient and the degree of protection. The effect of inhibitor concentration on the rate of low carbon steel bio-corrosion has been studied. It has been proven that the rate of corrosion processes decreased by 50 times, when exposed to a medium, contaminated with fungus spores, on metal samples treated with an inhibitor.

Material Property of a Passive Oxide Formed on Alloy 600

2007 ◽  
Vol 26-28 ◽  
pp. 937-940 ◽  
Author(s):  
Dong Jin Kim ◽  
Hyuk Chul Kwon ◽  
Seong Sik Hwang ◽  
Hong Pyo Kim
Keyword(s):  
Corrosion Resistance ◽  
Oxide Layer ◽  
Passive Film ◽  
Electrochemical Impedance ◽  
Oxide Films ◽  
Oxide Thickness ◽  
Solution Temperature ◽  
Alloy 600 ◽  
Pressurized Water ◽  
Electrochemical Behaviors

Alloy 600 is used as a material for a steam generator tubing in pressurized water reactors(PWR) due to its high corrosion resistance under a PWR environment. In spite of its corrosion resistance, a stress corrosion cracking(SCC) has occurred on the primary side as well as the secondary side of a tubing. It is known that a SCC is related to the electrochemical behaviors of an anodic dissolution and a passivation of a bare surface of metals and alloys. Therefore in the present work, the passive oxide films on Alloy 600 have been investigated as a function of the solution temperature by using a potentiodynamic polarization, electrochemical impedance spectroscopy and a TEM, equipped with EDS. Moreover the semiconductive property was evaluated by using the Mott-Schottky relation. It was found that the passivity depends on the chemical composition and the densification of the oxide film rather than the oxide thickness. As the solution temperature of 0.5M H3BO3 increased, the thickness of the passive film increased but the oxide resistance of the passive film was decreased, indicating that the measured current in the passive region of the potentiodynamic curve is closely related to the stability of the passive film rather than the oxide thickness. It was found that the oxide films were composed of an outer oxide layer with a lower resistance and an inner oxide layer with a relatively higher resistance. From the Mott-Schottky relation, the oxide formed at 300oC showed a p-type semiconductor property unlike the n-type oxide films up to 250oC.

scholarly journals Multi-Component Adsorption of Benzene, Toluene, Ethylbenzene, and Xylene from Aqueous Solutions by Montmorillonite Modified with Tetradecyl Trimethyl Ammonium Bromide

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
H. Nourmoradi ◽  
Mehdi Khiadani ◽  
M. Nikaeen
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Structural Changes ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Ammonium Bromide ◽  
Order Kinetic ◽  
Multicomponent Adsorption ◽  
Benzene Toluene ◽  
Kinetic And Isotherm Models

Multicomponent adsorption of benzene, toluene, ethylbenzene, and xylene (BTEX) was assessed in aqueous solutions by montmorillonite modified with tetradecyl trimethyl ammonium bromide (TTAB-Mt). Batch experiments were conducted to determine the influences of parameters including loading rates of surfactant, contact time, pH, adsorbate concentration, and temperature on the adsorption efficiency. Scanning electron microscope (SEM) and X-ray diffractometer (XRD) were used to determine the adsorbent properties. Results showed that the modification of the adsorbent via the surfactant causes structural changes of the adsorbent. It was found that the optimum adsorption condition achieves with the surfactant loading rate of 200% of the cation exchange capacity (CEC) of the adsorbent for a period of 24 h. The sorption of BTEX by TTAB-Mt was in the order ofB<T<E<X. The experimental data were fitted by many kinetic and isotherm models. The results also showed that the pseudo-second-order kinetic model and Freundlich isotherm model could, respectively, be fitted to the experimental data better than other available kinetic and isotherm models. The thermodynamic study indicated that the sorption of BTEX with TTAB-Mt was achieved spontaneously and the adsorption process was endothermic as well as physical in nature. The regeneration results of the adsorbent also showed that the adsorption capacity of adsorbent after one use was 51% to 70% of original TTAB-Mt.

Corrosion resistance of structural and sealing materials in aqueous solutions of dimethylformamide

1979 ◽  
Vol 15 (3) ◽  
pp. 211-212
Author(s):  
R. A. Valieva ◽  
G. E. Kuznetsova ◽  
V. P. Evstigneeva
Keyword(s):  
Corrosion Resistance ◽  
Aqueous Solutions ◽  
Sealing Materials

scholarly journals Measurement and Prediction of Densities of Ternary Aqueous Mixtures Involving Sodium Polyacrylate

2004 ◽  
Vol 4 (1) ◽  
pp. 64
Author(s):  
Z. A. Noor Fadzlina ◽  
T. T. Teng ◽  
M. Abdul Rahman
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Percentage Error ◽  
Sodium Polyacrylate ◽  
Aqueous Systems ◽  
Aqueous Mixtures ◽  
Density Prediction ◽  
Density Values ◽  
Good Agreement

The densities of the binary aqueous solutions of sodium polyacrylate (NaPM) at 20°C, 25°C, and 300C up to 0.17 m and LiCI at 25°C and 300C up to 3.13 m were measured using a vibrating tube digital densitimeter. The measured experimental data were then fitted to the polynomial d = do + IA;m'. The densities of the ternary aqueous systems NaPM-NaCI, NaPM-LiCI, and NaPM-sucrose were also =1 measured from 20°C to 30°C. The isopycnotic equation, Imi / moi was used to predict the densities of the ternary aqueous systems mentioned. The results show that predicted and observed density values are in good agreement. The overall percentage error of density prediction for the system NaPM-NaCI-H20 is 0.067. For the system NaPM-LiCI-HP,the overall percentage error is 0.074; and, for the system NaPM-sucrose-H20, the overall percentage error is 0.065.

Sign in / Sign up

Export Citation Format

Share Document