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EnglishSome different types of organic substances (an acetylenic derivative, S- or N-containing compounds) were tested as inhibitors for the intergranular (IG) corrosion of a sensitized AISI 304 stainless steel, in diluted sulphuric or sulphamic acid solutions at 70 °C. The sole compounds able to stop the IG attack were those with a S atom with electronic lone pair free. These inhibitors perforrmed their action by reducing the differences in the corrosion rates between the chromium depleted grain-boundaries and the matrix. The influence exerted by HS- ion on the corrosion process was evaluated, since some of the efficient inhibitors could decompose with the formation of HS- ions (or H2S).
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| Data di pubblicazione: | 1983 | |
| Titolo: | The inhibition of the intergranular corrosion of a sensitized stainless steel in hot acidic solutions. | |
| Autori: | TRABANELLI G.; A. FRIGNANI; ZUCCHI F.; ZUCCHINI M. | |
| Rivista: | ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE | |
| Parole Chiave: | INHIBITION; INTERGRANULAR CORROSION; SENSITIZED STAINLESS STEEL; ORGANIC INHIBITORS; SULPHURIC ACID; SULPHAMIC ACID. | |
| Abstract: | Some different types of organic substances (an acetylenic derivative, S- or N-containing compounds) were tested as inhibitors for the intergranular (IG) corrosion of a sensitized AISI 304 stainless steel, in diluted sulphuric or sulphamic acid solutions at 70 °C. The sole compounds able to stop the IG attack were those with a S atom with electronic lone pair free. These inhibitors perforrmed their action by reducing the differences in the corrosion rates between the chromium depleted grain-boundaries and the matrix. The influence exerted by HS- ion on the corrosion process was evaluated, since some of the efficient inhibitors could decompose with the formation of HS- ions (or H2S). | |
| Handle: | http://hdl.handle.net/11392/461465 | |
| Appare nelle tipologie: | 03.1 Articolo su rivista |
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