Improvement of corrosion resistance of galvanization/nickel/chrome plating low carbon steels in H₂SO₄under dynamic condition

Abstract

In this work, the corrosion resistance of metallic coating (ISO 1416) deposited on AISI 1080 low carbon steel has been investigated under static and dynamic conditions (flow rate 30 rpm). The coated steels have been immersed into aqua solution of H 2 SO 4 at 80 °C temperature up to 3 h where pH value 1 is maintained. The corroded surfaces are characterized by SEM, XRD, ATR, EDS and Tafel extrapolation methods. Results show that the corrosion under static condition is higher than that of dynamic condition both for coated and uncoated surfaces. The coated steels exhibit lower corrosion in comparison of uncoated steels. The low carbon steel experiences significant corrosion resistance property in combined effects of dynamic environment and coating surface. Corrosion rate is calculated by following weight loss method. The corrosion damage is remarkably high for low carbon steels. The nickel-plating steel exhibits more corrosion resistance in H 2 SO 4 corrosive medium when comparing with chrome plating steel. On the other hand, chrome plating steel happens more corrosion resistance in comparison of galvanized steel. Besides, lower flow rate makes higher rate of corrosion and lower depth of penetration. It is expected that the outcomes of this work will contribute to the improvement of different concerned mechanical and tribological processes where the corrosion concerning issue.

Green tea and tulsi extracts as efficient green corrosion inhibitor for aluminum alloy in alkaline medium

“…The surface of the Al alloy will degrade more rapidly in the absence of these inhibitors. This is due to the fact that metals are easy to dissolve in alkaline settings [ 30 , 56 , 57 ].

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