This paper investigates the influence chromium content exerts on the corrosion resistance of low-alloyed chromium steels in HF solution at 45 °C and compares it with the corrosion resistance in other acids, such as HCl, HClO4, H2SO4. Weight-losses showed that chromium decreases the corrosion resistance of the low-alloyed chromium in perchloric, sulphuric and mainly in hydrofluoric acid solutions. Some classes of organic substances were tested as inhibitors of HF corrosion: the most efficient were those containing a sulphur atom with available lone pairs. These substances performed their action by inhibiting the anodic and the cathodic reactions.

Corrosion and inhibition of low-alloyed chromium steels in hydrofluoric acid solutions.

TRABANELLI, Giordano;FRIGNANI, Alessandro;BRUNORO, Giancarlo;MONTICELLI, Cecilia;ZUCCHI, Fabrizio
1985

Abstract

This paper investigates the influence chromium content exerts on the corrosion resistance of low-alloyed chromium steels in HF solution at 45 °C and compares it with the corrosion resistance in other acids, such as HCl, HClO4, H2SO4. Weight-losses showed that chromium decreases the corrosion resistance of the low-alloyed chromium in perchloric, sulphuric and mainly in hydrofluoric acid solutions. Some classes of organic substances were tested as inhibitors of HF corrosion: the most efficient were those containing a sulphur atom with available lone pairs. These substances performed their action by inhibiting the anodic and the cathodic reactions.
1985
Trabanelli, Giordano; Frignani, Alessandro; Brunoro, Giancarlo; Monticelli, Cecilia; Zucchi, Fabrizio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/461462
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