Steel automotive, corrosion rates

Corrosion is an electrochemical process leading to a decrease in thickness and strength of materials. Steel is the most widely used metal in industry and has weak resistance to corrosion. Corrosion resistance can be increased with addition of chrome and nickel. Adding of metals causes an increase in the production cost of steel. To develop the corrosion resistance, polyelectrolyte multilayers can be used to coat stainless steel with low cost [14]. The main aim to coat a metal is to protect it from corrosion. The layer-by-layer self-assembly method is used to prepare polyelectrolyte multilayers. Corrosion of metals can be reduced with inhibitors. Severe corrosion protective coatings are used in many apphcation areas such as automotive, steel, pipe, petroleum and hning industry. Polyelectrolyte multilayers (PEMs) are an alternative method to protect the materials from corrosion. PEMs can be produced with anionic and cationic polyelectrolytes. In addition, PEMs has wide application areas such as membrane separation, microfluidies, biocatalytic and analytical separations. Cationic polyaUylamine hydrochloride (PAH), anionic polystyrene sulfonate (PSS), polystyrene suUbnate-co-maleic acid (PSS-co-MA) and polyacrylic acid (PAA) were used to investigate the corrosion protection efficiency of polyelectrolyte. Corrosion rate, corrosion potential and linear polarization resistance were examined as corrosion process parameters. In addition, polydiaUyldimethylammonium chloride (PDADMAC) was used with sulfonated polyetherether ketone (SPEEK) for steel corrosion applications [14]. 

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