Abstract
In any industry like a power station, corrosion is a natural process that commonly happens and one of the problems that need to be considered. The example is in the underground pipeline where sea water is transported for cooling purposes. This study mainly on corrosion rate and mechanical properties of coating material on mild steel. Theoretically, Metal can get the higher rate of corrosion when exposed to the surrounding environment. Corrosion can cause to a lot of unwanted conditions, including failures in functions and higher maintenance cost as well as it is too risky for safety. The objective of this project is to study the corrosion rate and mechanical properties of the coating material of pure epoxy, aluminum oxide (Al2O3) and cerium oxide (CeO2) on mild steel. Different composition of epoxy/ Al2O3/CeO2 coating tested on mild steel specimen. There is three experimental conduct which is a Gamry test for corrosion rate and impact and hardness test for mechanical tests. As a conclusion, the results from the tests show that the coated mild steel of Al2O3-CeO2-epoxy obtained the best value in term of corrosion resistance and mechanical properties.
Highlights
A protective coating is one of the methods that act as a corrosion protection in the underground pipeline
Mild steels were successfully coated with the composition of epoxy, aluminium oxide (Al2O3) and cerium oxide (CeO2) and characterized for its mechanical properties and corrosion rate
A new coating material has been developed from the combination of organic and inorganic material which is epoxy with Al2O3 and CeO2
Summary
A protective coating is one of the methods that act as a corrosion protection in the underground pipeline. Organic coatings are commonly used in industry for corrosion prevention on metallic surfaces. The addition of a small percentage of metal particles to an organic material like epoxy can improve the corrosion resistance and mechanical properties [3]. Al2O3 particles can influence the boundary and mechanical properties of the organic coatings. High electrochemical reactivity and inclination of Al2O3 particles for response with oxygen and moisture can reduce the formation of oxide layer and increase the resistance of the base metal against corrosion [4]. Even though the modified Al2O3 particles into epoxy coating can improve the corrosion rate, but the layer is still unstable at some pH value that bringing about detached layer disintegration which decreases its lifespan and protective characteristics in corrosive conditions [5]. The self-healing part of Ce4+ is another parameter influencing its corrosion defensive performance [6]
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