Some N-containing or S-containing organic substances and some acetylenic alcohols were tested as inhibitors of the corrosive attack suffered by Fe-based metallic glasses in deareated 0.1N sulfuric acid solution at 25 °C. The specific action that these compounds exerted on the corrosion process of the amorphous alloy was similar to that exerted on polycrystalline iron. The most efficient substances were those containing a sulfur atom with available lone lone pairs, which chiefly inhibited the anodic reaction on both metal specimens. Owing to the chemical and physical homogeneity of the amorphous alloy, the chemisorbed inhibitor film formed on the glassy surface was more stable and protective that formed on polycrystalline iron.
Influence of organic additives on the corrosion of iron-based amorphous alloys in dilute sulfuric acid solutions
FRIGNANI, Alessandro;TRABANELLI, Giordano
1999
Abstract
Some N-containing or S-containing organic substances and some acetylenic alcohols were tested as inhibitors of the corrosive attack suffered by Fe-based metallic glasses in deareated 0.1N sulfuric acid solution at 25 °C. The specific action that these compounds exerted on the corrosion process of the amorphous alloy was similar to that exerted on polycrystalline iron. The most efficient substances were those containing a sulfur atom with available lone lone pairs, which chiefly inhibited the anodic reaction on both metal specimens. Owing to the chemical and physical homogeneity of the amorphous alloy, the chemisorbed inhibitor film formed on the glassy surface was more stable and protective that formed on polycrystalline iron.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
