Epoxy Marine Paint for Coating of Welded Metal

Sunny Ebere safety and tools enterprise. Epoxy/alumina composite coating on welded steel 316L with excellent wear and anticorrosion propeanticorrosive coatings for the welded steel 316L, since this later is widely used in industrial field. Hence, within this work we have studied the electrochemical behaviour of different zones of the welded steel 316 in 1 M HCl media. The macrography study of the welded steel has revealed the different areas with a good contrast. We have stated three different zones, namely; melted zone (MZ), heat affected zone (HAZ) and base metal zone (BM). Impedance studies on welded steel 316L were conducted in 1 M HCl solution, coating of Epoxy/Alumina composite was applied on different zones, in order to reveal the anti-corrosion efficiency in each zone. Scanning electron microscopy (SEM) analysis was undertaken in order to check how far the used coating in such aggressive media protects the studied zones and these findings were assessed by water contact angle measurements. The choice of this coating is based on the cost and the safety. We concluded that the Epoxy/Alumina composite has a good protecting effect regarding welded steel in aggressive media. Introduction 316L welded steel is very useful in industry, infrastructure transportation and container transportation. The welded steel protection is usually fulfilled through its corrosion inhibition whose efficiency is based on many options and parameters, these parameters are related to the environmental perspective and reasonable cost. In the same framework, many studies have taken place1,2,3,4,5,6,7,8. For low carbon steel, the inhibitory effect of inorganic glass composed of (50% K2O, 25% P2O5 and 25% CaO) in 1 M HCl shows that the optical structural analysis provides a good protection for the surface1. The experimental results show that when the forging pressure increases, the hardness of the welding interface will increase when the tensile strength decreases9. The electrochemical and microstructural behaviours of "A106—Gr.B" and 316L welded pipes with nickel based alloys were studied. In welded joints, the microstructure of the heat affected zone on the root weld leads to strong grain refinement and polygonal ferrite and pearlite formation by welding heat cycle change10. Also, effect of the microstructure on contact angle (CA) and corrosion of ductile Iron–Graphite composite "ferrite, pearlite and graphite" was studied. It was proven that pearlite is more susceptible to corrosion than (ferrite and graphite). A higher portion of pearlite in the microstructure can be detrimental to corrosion resistance of the material11. Microstructure characterization of the steel 316L and the effect of the welding energy Preparation and characterization of the microstructure steel 316L In this section, we prepared base metals to identify the microstructure before welding. After that, we tried to highlight the influence of thermal cycle changes on the microstructure and the mechanical properties of welded steel joints with similar filler metals. We prepared welding samples by cutting a pair of ingots with a dimension of 2 cm ×× 2 cm (Fig. 1a).

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