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The authors have prepared the triazole film on copper surface by click reaction and explored its inhibition mechanism.

The protective film is assembled by immersing bronze in solution containing p-toluenesulfonyl azide (TA) and propiolic acid (PA).

Fourier transform infrared spectroscopy (FT-IR) indicates that triazole (TTP) film was formed on bronze surface via click chemistry reaction between TA and PA. It shows TTP film has a good protection for bronze in the atmospheric environment simulation solution. Quantum chemical calculation (QC) and molecule dynamics simulation suggests TTP molecule adsorbs on bronze surface via N and O.

This is beneficial to develop the corrosion inhibitors for the corroded copper alloys.

The need for protective films which aid in retention of newly fabricated surfaces of copper and copper alloys is generally recognized. Two commercially available aromatic triazoles function as unique corrosion inhibitors particularly of copper and copper alloys. Benzotriazole and tolyltriazole, which are manufactured by Sherwin Williams Chemicals, a Division of The Sherwin‐Williams Company, are known by the trademarked names of CobratecR 99 and CobratecR TT‐100, respectively. The chemical structures of these compounds, which are shown in Figure 1, have essentially the same functioral characteristics. Use of tolyltriazole is favoured for many applications because of economic considerations.

The purpose of this paper is to investigate the self‐assembled monolayers (SAMs) of phytic acid on cupronickel B30 surface of anticorrosion and inhibiting mechanisms.

Electrochemical and photocurrent response methods were performed to determine the effect of phytic acid SAMs on cupronickel B30.

The results indicated that phytic acid was liable to interact with B30 as a result of formation of complexes on B30 surface for anti‐rust and anti‐corrosion. The SAMs changed the structure of the electrochemical double layer and made the value of double layer capacitance decrease significantly. The B30 electrode showed p‐type photoresponse, which came from Cu₂O layer on its surface. The photoresponse decreased greatly due to the SAMs of phytic acid as the corrosion resisting property was enhanced. This finding was in good agreement with the results obtained from EIS and polarization curves. Adsorption of phytic acid was found to follow the Langmuir adsorption isotherm and the adsorption mechanism was typical of chemisorption.

The SAMs of phytic acid on cupronickel B30 was gained for the first time. The photo‐electrochemical method was an in situ method, which was effective for characterizing optical and electronic properties of passive films.

The inhibitor 5‐mercapto‐3‐p‐nitrophenyl‐1‐2‐4‐triazole has 92.75 per cent inhibition efficiency in controlling corrosion of copper in neutral aqueous environment, containing 300 ppm Cl^‐, a situation where the chloride concentration of the cooling water system will usually be not greater than 300 ppm. A discussion of mechanistic aspects of corrosion inhibition is based, in a holistic way, on the results obtained from the classical weight loss method, potentiostatic polarisation study, AC‐impedance study, UV‐visible absorption study and different surface examination techniques like FTIR, XRD and ESCA. The protective film is found to be of unimolecular thickness and to consist of Cu (I) – inhibitor complex cuprous chloride, CuCl or CuCl₂^‐ complex ion or both and no oxide of copper on the surface.

The anticorrosive action of the two compounds: 4‐(p‐chlorobenzylidene‐amino)‐3‐hydrazino‐5‐thio‐1,2, 4‐triazole (I) and 4‐(p‐chloro‐benzylideneamino)‐3‐(p‐chlorobenzy‐lidenehydrazino)‐5‐thio‐1,2,4‐triazole (II) against marine corrosion have been tested using four different marine paint compositions containing the compounds. The paints were applied on steel panels and tested in a sea‐water medium. The same paint formulations were tested for antifouling activity by applying the paints containing the compounds on PVC panels and immersing them in the water of Alexandria western harbour. The formulations based on compounds (I) showed better steel protection than their analogue containing compound (II), and protect their surfaces from marine corrosion for about seven months.

The inhibitive action of triazoles and surfactants on the corrosion of carbon steel has been studied using the weight loss method and electrochemical studies. Results obtained show that these organic compounds are very good inhibitors. Potentiodynamic polarisation studies clearly reveal the type of inhibitor. The corrosion parameters such as corrosion current (i_corr), corrosion potential (E_corr), inhibition efficiency (IE), corrosion rate, and activation energy (E_a) were calculated at different temperatures ranging from 303 to 333 K. The adsorption of triazole compounds on carbon steel surface obeyed Langmuir's adsorption isotherm.

Three different paint compositions were prepared, based on the same type of binder and rosin and different type of toxic pigments which are copper, cobalt and nickel complexes of 4‐amino‐3‐hydrazino‐5‐thio‐1,2,4‐triazole (I). Each metal complex of compound (I) is either present as a sole toxic pigment in the paint composition or in the presence of 4‐(p‐chlorobenzyldineamino)‐3‐(p‐chlorobenzylidenehydrazino)‐5‐thio‐1,2,4‐triazole (II).

This study aims to investigate the inhibition effect of a newly synthesized1,2,3-triazole containing a carbohydrate and imidazole substituents, namely, 1-((1-((2,2,7,7-tetramethyltetrahydro-5H-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-5-yl)methyl)-1H-1,2,3-triazol-4-yl)methyl)-1H-benzo[d]imidazole (TTB) on the corrosion of mild steel in aerated 1 M H₂SO₄.

The authors have used weight loss measurement, potentiodynamic polarization, electrochemical impedance spectroscopy, FT-IR studies, scanning electron microscopy analysis and energy dispersive X-ray (EDX) spectroscopy techniques.

It is found that, in the working range of 298-328 K, the inhibition efficiency of TTB increases with increasing concentration to attain the highest value (92 per cent) at 2.5 × 10⁻³ M. Both chemisorption and physisorption of TTB take place on the mild steel, resulting in the formation of an inhibiting film. Computational methods point to the imidazole and phenyl ring as the main structural parts responsible of adsorption by electron-donating to the steel surface, while the triazol ring is responsible for the electron accepting. Such strong donating–accepting interactions lead to higher inhibition efficiency of TTB in the aqueous working system.

This work is original with the aim of finding new acid corrosion inhibitors.

The aim of this paper was to inhibit the serious corrosion of conventional ionic liquids, a series of new ionic liquids (ILs) containing the triazole functionality, as the anti-corrosion groups were synthesized in this work.

It is well known that nitrogen and sulfur containing organic compounds have been traditionally used as corrosion inhibitors. Among them, triazole derivatives are most often used as corrosion inhibitors. To alleviate the corrosion of the ILs and further improve the anti-wear property, the authors prepared a series of imidazolium ILs modified with the triazole functionality in the present study.

The corrosion behavior of the ILs was evaluated with the iron disk corrosion test and their tribological properties were investigated on an Optimol SRV IV oscillating friction and wear tester at elevated temperatures. The results showed that the ILs with the triazole functionality could effectively reduce the corrosion and exhibit a smaller friction coefficient and wear volume than the unmodified counterpart. The ILs containing the triazole functionality can be used as the single component anti-corrosion base oils even at elevated temperatures.

The results showed that the ILs with the triazole functionality could effectively reduce the corrosion and exhibit a smaller friction coefficient and wear volume than the unmodified counterpart. The ILs containing the triazole functionality can be used as the single component anti-corrosion base oils even at elevated temperatures.

The purpose of this paper is to report the studies on the corrosion inhibition property of 4-amino-5-phenyl-4H-1,2,4-triazole-3-thiol (APTT) for the corrosion of 6061 Al-15 vol. pct. SiC(p) composite.

The corrosion behavior of 6061 Al-15 vol. pct. SiC(p) composite was studied at different temperatures in 0.5-M sodium hydroxide (NaOH) solution in the presence of APTT by potentiodynamic polarization (PDP) and electrochemical impedance spectroscopic techniques. The effect of inhibitor concentration and temperature on the inhibitor effect of APTT was studied. The surface morphology of the metal surface was investigated by scanning electron microscopy. The activation parameters for the corrosion of the composite and base alloy, as well as the thermodynamic parameters for the adsorption of APTT on the composite and alloy surfaces, were calculated.

The inhibition efficiency of APTT increases with the increase in the concentration of the inhibitor and decreases with the increase in temperature. The adsorption of APTT on the composite was found to be through physisorption, obeying Langmuir’s adsorption isotherm. APTT acts as a mixed inhibitor with predominant cathodic action on the composite.

APTT can be used as an inhibitor for the corrosion of 6061 Al-15 vol. pct. SiC(p) composite in the NaOH medium.

This paper provides information regarding the corrosion inhibition property of APTT on 6061 Al-15 vol. pct. SiC(p) composite. An attempt was made to explain the mechanism of the inhibition action by APTT.