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.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
