Corrosion Phenomenon and Its Analysis of 6063 Aluminum Alloy in Ethyl Alcohol

Abstract

It was found that aluminum alkoxide reaction of aluminum alloy 6063 occurs in ethyl alcohol containing aluminum chloride. The reaction is explained by the superimposition of Al/Al 3þ reaction as the anodic reaction and ethanol/ethlate reaction as the cathodic reaction. In an environment containing chloride ions, an Al/AlCl 3 reaction participates in anodic reaction above and then becomes dominant anodic reaction. Rate of aluminum dissolution by the Al/AlCl 3 anodic reaction in ethyl alcohol is accelerated due to the fast system which has low polarization resistance. It is shown that aluminum alkoxide (aluminumtriethoxide) as corrosion product will produce hydrogen peroxide on the way of chain process of productions of ethyl chloride, diethyether and ethyether peroxide. It is also pointed out that the hydrogen peroxide will play a strong cathodic role in further pitting corrosion process.

Preparation of Aluminumtriethoxide by Application of Aluminum Corrosion

“…Figure 4 shows result. 8,12) It is glanced that the anodic reaction curves of the eq. (10) governs the almost of anodic reaction.…”

“…(7) will occur even if an environment is an alcohol which contains chloride ions. The anodic reaction above must be rapid reaction, so-called ''fast system'', 8,9) because it has experimentally been found that the eq. (7) has been severely attack reaction for aluminum.…”

“…(5), (6) and (7) will be plotted by substituting numerical values, which are tabulated in Table 1, for items in eqs. (8), (9) and (10). Figure 4 shows result.…”

Efectos del uso de electrolitos soportes en ensayos electroquímicos de la aleación Al-4%Mg expuesta a bioetanol combustible

“…Existen diferentes métodos para realizar la corrección de caída de potencial generado en ensayos con medios de baja conductividad, y uno de ellos consiste en la adición de sales solubles capaces de minimizar la resistencia del medio permaneciendo inertes [13][14][15], denominados electrolitos soportes. Algunos de ellos, como LiClO 4 y CH 3 COOK, se utilizan ampliamente como proceso de caracterización de materiales según la bibliografía [16][17][18][19].…”

Effects of Alloying Elements in Aluminum Alloys and Activations on Zincate Treatment and Electroless Nickel-Phosphorus Plating

“…As one of the measures to improve surface properties of aluminum alloys, electroless nickelphosphorus plating [1][2][3][4] is promising for its excellent corrosion resistance as well as high hardness of $HV600 and wear resistance. Recently, corrosion of aluminum by bio-fuels [5][6][7][8] has become of interest in automotive applications, which is hopefully suppressed by nickel-based platings.…”