Anti-Corrosion Characteristics of Electrodeposited Self-Doped Polyaniline Films on Mild Steel in Low Acidity

Abstract

Without the addition of inorganic acids, 2,5-Diaminobenzenesulfonic acid (DABSA) molecules form an acid environment, and are then electrochemically copolymerized with AN monomers to generate a self-doped polyaniline (SPAN) film on mild steel substrates. These SPAN deposition films are employed to test the protection efficiency for mild steel in a corrosion environment of HCl and NaCl, respectively. Electrochemical impedance spectroscopy (EIS) and polarization were used to determine the charge transfer resistance (R ct ) and corrosion current (I corr ), respectively. The above two parameters R ct and I corr are combined to evaluate the protection efficiency of SPAN film on mild steel. Experimental results show that the SPAN thin film with the AN/DABSA ratio of 8.8 has the optimal corrosion resistance in 1 M HCl and 1 M NaCl aqueous solutions, respectively.

Fabrication of excellent anti-corrosion epoxy coating based on GON-An composites

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Electrochemical synthesis and corrosion protection of poly(3-aminophenylboronic acid-co-pyrrole) on mild steel

“…67,68 Concurrently, Fe 2 O 3 occurs in the pores of polymer coating and/or between polymer/MS interface. 64,69,70 Polymer coating restricts the diffusion of the corrosion products from MS; thus, corrosion products could protect by covering the steel surface. As the ratio of reduction increases, the reduced lm (LE p(APBA) ) is oxidized to EM p(APBA)…”

Electrochemical Synthesis, Characterization and Corrosion Properties of POA−MoO42- Coating in 3.5% NaCl

“…These films can be obtained also by the electrochemical method, which allows the control of properties resulting from coatings such as coating thickness, conductive properties, etc. [9][10][11].…”