Corrosion behaviour of metals in SO₂ environment and its prevention by some volatile corrosion inhibitors

Abstract

Atmospheric corrosion of mild steel, copper and zinc was studied in SO2 environment under dynamic flow conditions by weight loss measurements, and their corrosion prevention by the use of volatile corrosion inhibitors such as cyclohexylamine (CHA) and dicyclohexylamine (DCHA) is discussed. These studies assume importance as SO2 is one of the dominant pollutants in the atmosphere and more so in industrial belts affecting the stability of metal articles to a greater extent.

Multiphasic inhibition of mild steel corrosion in H 2 S gas environment

“…Using Octylsteramide (OTS) as volatile corrosion inhibitor for mild steel in Cl 2 environment, the inhibition efficiency was up to 98% (Kannan et al, 2012). CHA and DCHA are found to be more effective for mild steel and zinc than for copper in a vigorous SO 2 environment and protection efficiency was 76 and 85% respectively (Subramanian et al, 1999). Earlier, military equipments were protected by using camphor and ferrous metals (Singh and Banerjee, 1984).…”

Caprylate Salts Based on Amines as Volatile Corrosion Inhibitors for Metallic Zinc: Theoretical and Experimental Studies

“…Many organic molecules containing an amino functional group have been investigated and used as corrosion inhibitors for the zinc surface (Subramanian et al, 1999 ; Rammelt et al, 2009 ; Teixeira et al, 2015 ). The high electron density and the presence of oxygen, sulfur, nitrogen, and π-bonds are the main characteristics of these molecules tested as corrosion inhibitors (Quraishi et al, 2002 ; Vuorinen et al, 2004 ).…”

DAA, 1-BIZ and 5-ATZ as Vapour Phase Corrosion Inhibitors for Mild Steel under Different Aggressive Atmospheric Conditions at High Temperature

“…Organic substances have been studied as VPCI for mild steel were morpholine derivatives and diaminohexane derivatives [5], fatty acid thiosemicarbazides [6], cyclohexylamine and dicyclohexylamine [7,8], amine carboxylates [9], ammonium caprylate [10], benzoic hydrazide derivatives [11,12], polyamines [13], bis-piperidiniummethyl-urea and β-amino alcoholic compounds [14].…”