Corrosion Of Pure Aluminium Research Articles

Inhibition of Aluminum Corrosion in Hydrochloric Acid by n-, Di-n- and Tri-n-Butylamines

Abstract Weight losses of aluminum in hydrochloric acid are diminished in the ranges 16–75 for n-; 40–90 for di-n~ and 50–98percent for tri-n-butylamine. Inhibitor efficiency increases with acid concentration up to 1.25 or 1.5 N, depending on the inhibitor and is practically constant thereafter. Efficiency increases with increased inhibitor concentration up to a certain value, then remains constant. Optimum inhibitor concentration depends on acid concentration and immersion period. Experimental results indicate corrosion of pure aluminum in hydrochloric acid solutions is essentially under cathodic control and inhibition by amines is by adsorption on cathodic areas. A similar mechanism is indicated for aluminum alloyed with manganese.

高温純水中のAlの粒界腐食支配因子について

高温純水中のAlの粒界腐食支配因子について

Corrosion of Pure Aluminum and Tin in Salt Spray

Corrosion of Pure Aluminum and Tin in Salt Spray

Intergranular Corrosion of Pure Aluminium in Relation to the Behaviour of Grain-Boundaries during Melting*

IN two previous papers1,2 we showed in the case of pure aluminium recrystallized by the ‘critical deformation' method that the rate of etching of the grain boundaries by hydrochloric acid was more influenced by the relative orientations of adjoining crystals than by impurities in the metal itself. Thus the grain boundaries in two aluminium specimens of 99·99 and 99·998 per cent purity were corroded at the same rate in the case of crystals oriented at random, whereas the boundaries separating crystals of nearly identical relative orientations, or straight twin boundaries2, were not corroded at all, regardless of the duration of etching and the concentration of the reagent. We have already reported a similar effect3 when studying the micrographic etching of boundary lines in high-purity aluminium.

A quantitative study of the corrosion of pure aluminium

A quantitative study of the corrosion of pure aluminium