Effect of Sn and Cu on Corrosion Resistance of LaMgAlMnCoNi Type Alloys

Abstract

This paper reports the results of investigation carried out to evaluate the corrosion resistance of tin and copper in as-cast alloys represented by two sequential series, first: La0.7Mg0.3Al0.3Mn0.4Co0.5-xSnxNi3.8 (x = 0.0, 0.1, 0.2, 0.3 and 0.5) and second: La0.7Mg0.3Al0.3Mn0.4Sn0.5-yCuyNi3.8 (y = 0.0, 0.1, 0.2, 0.3 and 0.5). Electrochemical methods, specifically, polarization curves have been employed in this study. Copper substitution yielded good overall performance of the alloys.

Corrosion of Hydrogen Storage Metal Alloy LaMm-Ni4.1Al0.3Mn0.4Co0.45 in the Aqueous Solutions of Alkali Metal Hydroxides

“…Later it was discovered that Y 2 O 3 incorporates into the continuous corrosion layer as Y(OH) 3 , reducing a driving force towards formation of Mm(OH) 3 , thus, reducing the corrosion rate of the electrode [18]. It was also found that substitution of cobalt with a more noble tin or copper decreases corrosion of the anodic material [19]. Recently, it was reported that substitution of La sites with nickel atoms can significantly enlarge the cycle lifetime of an anode, even up to 2415 cycles in comparison with the standard lifetime of ca.…”

BOD Composite as a New Eco-Friendly Corrosion Inhibitor

“…Till currently, the electrochemical and protected films of P355 Cs joining in alkaline high (pH > 12.5) and anoxic environs at more polarization had negative (-1.0 V-0 V) potential are scarcely examined [18][19][20]. So, it is very worth travelling the structure and goods of the hindrance film obtain on P355 Cs in this condition [21][22][23].…”