The anticorrosive performance of cost saving zeolites

Abstract

Purpose In recent years, zeolites have been highlighted as a new component in many industrial applications owing to their unique properties. The purpose of this study is to apply three prepared types of zeolites Na-X, Na-Y and hydroxysodalite (Na-HS) in anticorrosive paint formulations to be evaluated as a partial replacement to zinc phosphate in anticorrosive paint formulations to protect carbon steel. Design/methodology/approach The three types of zeolites were characterized using different instrumental analysis such as X-ray diffraction, scanning electron microscopy and X-ray fluorescence. Evaluation of zeolites was done using American society for material and testing. Then, they were incorporated in paint formulations based on medium oil-modified soya-bean dehydrated castor oil alkyd resin in the presence and absence of zinc phosphate. Their corrosion behavior was estimated using both immersion test and electrochemical impedance measurements in 3.5% NaCl. Findings Generally, the prepared zeolites exhibited good corrosion protection performance, but in presence of zinc phosphate the performance was better. This proves that, zeolites by themselves can resist corrosion but not efficiently, while in presence of zinc phosphate and owing to a synergistic effect between them, the performance was better. This opens the way to partial replacement of zinc phosphate with another safer and cheaper ingredient, which is zeolite. Practical implications The three zeolites can be applied in many industries besides the paint industry, such as reinforcing filler in rubber, plastics and ceramic composites, also can be applied in paper filling, paper coatings and electrical insulation. Originality/value The three zeolites are environmentally friendly materials that can partially replace other expensive anticorrosive pigments (e.g. zinc phosphate).

Anticorrosive paint with a modified zeolite as functional pigment for SAE 1010 steel protection

“…This structure is characterized by the presence of cavities and intercommunicated channels, usually occupied by water molecules and interchangeable extra-reticular cations (Calabrese, 2018). Its properties of high surface area, elevated cation exchange capacity and acidity justify the wide use of zeolites as adsorbents, catalysts, ion exchange agents, antimicrobials (Al-subaie et al , 2015; Rojas-Pavón et al , 2015; Kozhevnikova and Styazhkina, 2013; Stashkiv et al , 2019; Alshameri et al , 2019; Kustovska, 2018; Iyigundogdu et al , 2014; Kabwadza-Corner et al , 2014) and, in our case, as containers that allow a gradual release of corrosion-inhibiting ions (Ahmed et al , 2011; Dias et al , 2012; Ferrer et al , 2014; Shaw and Tiwari, 2016; Dias et al , 2014; Roselli et al , 2014; Roselli et al , 2018; Abd El-Gawad et al , 2019).…”

Alkyd based water-reducible anticorrosive paints and their antifungal potential

“…Phosphates, exchanged zeolites, polyaniline and ferrites are used as anticorrosive pigments in paints [22][23][24][25][26]. Phosphate-based pigments such as zinc phosphate (ZP) and zinc aluminum phosphate (ZAP) are claimed to protect steel from corrosion by phosphating and shielding the surface [27][28][29] being ZAP better than ZP in damage areas [30].…”

The Impact of Coating Ingredients on the Aging Resistance of Topcoat Paints by Model Trees

“…Resin and pigment are the two main ingredients of paints. Many recent studies attempted to explore the individual impact of resin [8][9] or pigment [10][11][12][13][14]. These two ingredients can also be considered together to determine the performance of coatings [15][16][17].…”