Effect of 4-(N,N-diethylamino)benzaldehyde thiosemicarbazone on the corrosion of aged 18 Ni 250 grade maraging steel in phosphoric acid solution

Poornima, T.; Nayak, Jagannath; Shetty, A. Nityananda

doi:10.1016/j.corsci.2011.07.014

Cited by 85 publications

(33 citation statements)

References 59 publications

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“…The rate of scale removal in phosphoric acid is comparable with that in HCl solutions and is much higher than that in H 2 SO 4 solutions [4,5]. Compounds of various classes are considered as steel corrosion inhibitors in H 3 PO 4 solutions: quaternary ammonium salts [6], barbiturates [7], a substituted thiosemicarbazide [8], imidazole and its derivatives [9], substituted triazoles [10], amino-and mercaptothiazoles [11], allylthiourea [12]. However, only some of them (triazoles and sulfur-containing compounds) provide a high protection degree, Z  90%.…”

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confidence: 99%

Protection of low-carbon steel in phosphoric acid solutions by mixtures of a substituted triazole with sulfur-containing compounds

Avdeev¹,

Tyurina²,

Kuznetsov³

2014

Int. J. Corros. Scale Inhib.

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Based on IFKhAN-92 inhibitor, which is a substituted triazole, and sulfur-containing additives, efficient mixtures have been developed that protect low-carbon steel in phosphoric acid solutions in a broad range of acid concentrations (2.0-8.0 M) and temperatures (0-95C). . However, only some of them (triazoles and sulfur-containing compounds) provide a high protection degree, Z  90%. A promising method to prevent steel corrosion in phosphoric acid solutions involves mixed inhibitors. Various additives are used to enhance the effect of inhibitors: halide anions for quaternary ammonium salts and purine derivatives [13,14], cerium (IV) cations for sodium oleate [15], and uracil for a substituted tetrazole [16]. Addition of sulfur-containing compounds makes it possible to use the "PKU" industrial inhibitor in these media [17]. Based on IFKhAN-92, a triazole derivative, we have developed efficient inhibitor blends for the protection of low-carbon steels in mineral acid solutions [18,19]. It appeared expedient to develop a formulation for the protection of low-carbon steel in phosphoric acid solutions based on IFKhAN-92 inhibitor. Experimental procedureThe corrosion rate of St3 low-carbon steel in H 3 PO 4 solutions was determined from the mass loss of specimens (at least three specimens per experimental point) sized 50.0 mm  20.0 mm  1.5 mm, using 50 ml of the acid solution per specimen, in the temperature range

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confidence: 99%

Protection of low-carbon steel in phosphoric acid solutions by mixtures of a substituted triazole with sulfur-containing compounds

Avdeev¹,

Tyurina²,

Kuznetsov³

2014

Int. J. Corros. Scale Inhib.

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“…Some additional protection like use of corrosion inhibitor is necessary. However no literature seems to be available on the corrosion behavior of maraging steel in the acid medium except previous study by T. Poorninaet.al [11]. Although the maraging steel alloys, in general, are corrosion resistant compared to conventional steels, their previous study has revealed substantial corrosion of aged maraging steel in phosphoric acid medium at low concentrations.…”

Section: Introductionmentioning

confidence: 87%

Effect of 1,2,3benzotriazole on the corrosion of aged 18Ni250 grade Maraging steel in Phosphoric acid solution

Naik¹,

Nayak

Girish³

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Titanium nitride (TiN) precipitation in a maraging steel during the vacuum arc remelting (VAR) process -Inclusions characterization and modeling V Descotes, J-P Bellot, V Perrin-Guérin et al. Abstract:The 18 Ni 250 grade maraging steel is a potential high strength steel for advanced technologies such as aerospace, nuclear, and sporting goods. Phosphoric acid and Nitric acid solutions are used in pickling of delicate and precision items where re-rusting after pickling has to be avoided. The present work addresses the study of corrosion behaviour and inhibition using 1,2,3 benzotriazole of aged 18 Ni 250 grade maraging steel in phosphoric acid medium at higher concentration by Potentiodynamic Polarization Technique. The corrosion rates were determined in 1M, 1.5M and 2M by Tafel extrapolation technique in the temperature range 30 0 C-50 0 C with different concentrations of inhibitor. The results indicate that the corrosion rate increases with increase in acid concentration and temperature.Inhibition efficiency of 1,2,3benzotriazolewas found to increase with the increase in 1,2,3 benzotriazole concentration and decrease with the increase in temperature.The activation energy Ea and other thermodynamic parameters (∆G˚, ∆H # and ∆S # ) have been evaluated and discussed. The standard free energy of adsorption ∆G˚ads values indicates that the adsorption is of mixed type. Scanning electron microscopy (SEM) study confirmed the formation of an adsorbed protective film on the metal surface.

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“…É relatado que substâncias que contêm enxofre apresentam melhor efeito protetor comparadas com aquelas que contém nitrogênio, uma vez que o enxofre apresenta maior polarizabilidade e a presença de dois pares de elétrons livres para coordenação com o metal. 7 Apesar de muitos dos agentes anticorrosivos usados atualmente possuírem alta eficiência de inibição, a maioria apresenta efeitos colaterais indesejáveis, mesmo em pequenas concentrações, devido à sua toxicidade, agressão ao meio ambiente e alto custo. 8 Visando minimizar ou até mesmo sanar os efeitos colaterais causados pelos inibidores de corrosão, a pesquisa por novos agentes vem aumentando exponencialmente, principalmente, na área de produtos naturais.…”

Section: Os Agentes Inibidores Orgânicos De Corrosãounclassified

Evaluation of the Anti-corrosion Activity of Formulations with Crude Extract through Gravimetric and Electrochemical Techniques

Albuquerque¹,

Oliveira²,

Echevarrı́a³

2015

Revista Virtual De Química

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Abstract:Corrosion is the spontaneous process of metal degradation; therefore, there is a great necessity to search for new agents or formulations that diminish this effect. This study aimed to evaluate the efficiency as corrosion inhibitors of formulations, combined or not, containing 4-hydroxybenzaldehyde thiosemicarbazone (TIO-1) and another containing the crude vegetal extract, in ethyl acetat, of the species Talinum triangulare (Portulacaceae) (TA). Mass loss analysis was used to evaluate the anti-corrosion activity as well as potentiodynamic polarization and electrochemical impedance spectroscopy. Results showed that the formulations were more efficient when compared to TIO-1 and to the crude extract alone. The determination of the double layer capacitance (Cdl) enabled the confirmation of increase of charge transfer resistance, possibly due to the formation of a more protective film than in the case of isolated TIO-1 and TA films.Keywords: Organic corrosion inhibitors; thiosemicarbazone; Talinum triangulare; anti-corrosion activity. ResumoA corrosão é um processo que degrada os metais espontaneamente, portanto, a busca por novos agentes ou formulações que possibilitem a diminuição desse efeito impõe-se como necessidade. Este trabalho objetivou a avaliação da eficiência como inibidores de corrosão de formulações, combinadas ou não, contendo o 4-hidroxibenzaldeído tiossemicarbazona (TIO-1) e outra contendo o extrato vegetal, em acetato de etila, da espécie Talinum triangulare (Portulacaceae) (TA). A metodologia utilizada para a avaliação da atividade anticorrosiva foi o ensaio gravimétrico de perda de massa e os eletroquímicos de polarização potenciodinâmica e espectroscopia de impedância eletroquímica. Os resultados mostraram que as formulações foram mais eficientes quando comparadas com a TIO-1 e o extrato vegetal isoladamente. O cálculo da capacitância de dupla camada (C dl ) para as formulações possibilitou avaliar que houve um aumento na resistência à transferência de carga e, possivelmente devido à formação de um filme protetor melhor que a TIO-1 e o TA isoladamente.

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Effect of 4-(N,N-diethylamino)benzaldehyde thiosemicarbazone on the corrosion of aged 18 Ni 250 grade maraging steel in phosphoric acid solution

Cited by 85 publications

References 59 publications

Protection of low-carbon steel in phosphoric acid solutions by mixtures of a substituted triazole with sulfur-containing compounds

Protection of low-carbon steel in phosphoric acid solutions by mixtures of a substituted triazole with sulfur-containing compounds

Effect of 1,2,3benzotriazole on the corrosion of aged 18Ni250 grade Maraging steel in Phosphoric acid solution

Evaluation of the Anti-corrosion Activity of Formulations with Crude Extract through Gravimetric and Electrochemical Techniques

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