Corrosion Behavior Of Bronze Research Articles

Influence of Formic Acid on Corrosion Behavior of Bronze under Thin Electrolyte Layer

Influence of Formic Acid on Corrosion Behavior of Bronze under Thin Electrolyte Layer

A study on the mechanical and corrosion behaviour of bronze – TiB2 metal matrix composites

In the current scenario, there is a surge in the infusion of composite materials for a wider range of applications. Metal Matrix Composites offered numerous benefits regarding the enhancement of mechanical behaviour and also the corrosion behaviour under the influence of reinforcements. In this research, the bronze material, selected as the base material and TiB 2 , added as the reinforcement in different weight (wt) percentages (2%, 4%, and 6%). The liquid pathway (stir casting) is administered for composite preparation. This work focusses on the hardness, tensile strength and compressive strength of the prepared samples and also their corrosion behaviour. The presence of the reinforcements confirmed through XRD analysis and EDAX obtained with FESEM. Fractography studies are also conducted through FE-SEM. The results disclosed that the addition of reinforcement improves the mechanical characteristics of the composite samples. Corrosion properties indicated slight marginal improvement.

Corrosion behavior of bronze under organic acid‐containing thin electrolyte layer

The corrosion process and mechanism of three kinds of bronze materials under organic acid‐containing thin electrolyte layer (TEL) are investigated by electrochemical impedance spectroscopy (EIS) and Tafel polarization curves. It can be seen from the results that the corrosion rate of three specimens under TELs is lower than that in bulk solution. For bare bronze, the corrosion rate increases with the thickness of TEL, while for Cu2O patina bronze and CuCl patina bronze, there exists a critical thickness under TELs where the patina bronze have the maximum corrosion rate. In addition, the results show that Cu2O patina could increase the corrosion resistance, while CuCl patina, as a harmful patina, can accelerate the corrosion process. The principal corrosion products identified on the surface of bare bronze and Cu2O patina bronze are CuO, Cu(OH)2, and Cu(COOH)2, while the principal corrosion products identified on the surface of CuCl patina bronze is Cu2Cl(OH)3.

Effect of sulphate on the corrosion behavior of bronze under a chloride‐containing thin electrolyte layer

The effect of sulphate on the corrosion behavior of bronze under a chloride‐containing thin electrolyte layer (TEL) during wet–dry cycles has been studied by means of in situ electrochemical techniques and ex situ physical characterization. In the initial stage, corrosion rates of bronze under a chloride‐containing TEL decrease in the presence of sulphate, due to the fact that pit corrosion is inhibited by the sulphate. After long‐term exposure, however, corrosion rates are accelerated by sulphate addition, implying a synergistic effect between these components. This synergistic effect is ascribed to inhibition of the formation of protective Pb‐containing products by sulphate.

Corrosion behaviour of bronze in urban environments: influence of tin content

In this paper, the influence of the tin content on the corrosion behaviour of copper alloys was investigated. Three different bicomponent bronze alloys were exposed to a natural urban environment. The kinetic corrosion processes and the patina properties were monitored using the open circuit potential, electrochemical impedance spectroscopy and spectrocolorimetry. Results show that the bronze corrosion behaviour improves upon increasing the tin content. In addition, the mechanism of the patina formation is different for the three alloys.

Study on the inhibiting behavior of AMT on bronze in 5% citric acid solution

The corrosion behavior of bronze in the presence of 2-amino-5-mercapto-1,3,4-thiadiazole (AMT) has been investigated in 5% citric acid by electrochemical measurements such as potentiodynamic polarization method and electrochemical impedance spectroscopy (EIS). It has been revealed that AMT is a good inhibitor for bronze. Both cathodic process and anodic process on bronze treated with AMT were different from that on the bronze without AMT treatment. Fourier transform infrared (FTIR) analysis was carried out to characterize the protective film, which revealed that the composition of the protective film was polymeric Cu(I)-inhibitor complex. AMT acted as bidentate ligand through the aminic nitrogen atom and the closed ring nitrogen in the complex.

The Inhibition of AMT on Bronze Corrosion in 5％ Citric Acid

2-amino-5-mercapto-1, 3, 4-thiadiazole is a new inhibitor to resist the corrosion of copper and its alloys. The corrosion behavior of bronze in the presence of AMT has been investigated in 5% citric acid. Electrochemical potentiostatic polarization method and electrochemical impedance spectroscopy (EIS) were applied to analysis the effect of the organic compound on the corrosion inhibition of bronze. The results showed that AMT could greatly retard the corrosion of bronze in citric acid, which was attributed mainly to the protective film formed by AMT. Fourier transform infrared (FTIR) was used to characterize the surface film. A polymeric Cu (I) -inhibitor complex exhibiting strong corrosion inhibition that totally covered the bronze surface was identified. AMT behaves as bidentate ligand through the aminic nitrogen atom and the closed ring nitrogen in these complexes.