The inhibition effect of mad Honey on corrosion of 2007-type aluminium alloy in 3.5% NaCl solution

Abstract

The inhibition effect of mad honey on corrosion of 2007-type aluminium alloy in 3.5% NaCl solution was investigated by Tafel extrapolarisation (TP), electrochemical impedance spectroscopy (EIS) and dynamic electrochemical impedance spectroscopy (DEIS). All the studied parameters exhibited good anti-corrosive properties against corrosion of 2007-type aluminium alloy in the test solution; the corrosion rates decreased with the increase of the mad honey concentration. The surface morphology of the alloy was examined under scanning electron microscopy (SEM) in the absence and presence of the inhibitor. The inhibitory adsorption processes of mad honey on the 2007-type aluminium alloy surfaces conformed to the Langmuir adsorption isotherm.

Bee Wax Propolis Extract as Eco-Friendly Corrosion Inhibitors for 304SS in Sulfuric Acid

“…The results of investigation have shown that BWP extract act as good corrosion inhibitor for 304SS in 0.5 M sulfuric acid. Similar results were obtained using honey derivative as inhibitor in corrosion investigation on carbon steel [15], copper [24], aluminium [25], and CuNiFe [34] alloy in salt environment. Moreover, other investigations reported that the synergistic effect between honey and black radish juice increased the inhibition efficiency on corrosion of tin in aqueous and sodium chloride [16].…”

“…The starting potential was −1.0 V and the scan rate range extended up +1.0 V at Open Circuit Potential (OCP) with voltage scan rate of 0.001 V/s. Inhibition efficiency is calculated by [7,25,32] …”

“…In general organic molecules can inhibit metal corrosion by means of adsorption [25] that occurs depending on the chemical composition of molecule, temperature, and electrochemical potential on metal or interface solution/metal [22]. Organic compounds are mixed inhibitors that inhibit both the anodic and the cathodic reactions [9,18,22].…”

“…Moreover, inorganic inhibitors have characteristics that increase the corrosion rate if used in excess amount [17]. Therefore, the use of inorganic inhibitors has been replaced by organic inhibitors which are more eco-friendly, cheaper, and easier to obtain [18][19][20][21][22][23][24][25]. The efficient inhibitors are organic compounds that contain electronegative atom (i.e., N, S, or O) or double bond in their structure [26][27][28].…”

“…Organic inhibitors from natural material used are part of the plant [29], such as extract of the leaves [5,18], seeds [19], fruit [20], and rod [21]. Aside from the parts of plants, honey is also a natural material that have been reported to be good for retarding the corrosion rate of copper, carbon steel alloys, and aluminum in salt environment [15,24,25].…”