Corrosion resistance of PANi‐coated steel in simulated PEMFC anodic environment

Abstract

By using electrochemical techniques, the corrosion resistance of polyaniline (PANi)-coated 1Cr18Ni9Ti stainless steel was investigated in simulated proton exchange membrane fuel cell (PEMFC) anodic environment. The results indicated that the compact conductive PANi film could be obtained on 1Cr18Ni9Ti steel by pulse potentiostatic method (PPSM). When steel was coated with conductive PANi, its corrosion potential was improved from À350 to 250 mV in simulated corrosion solution. During the potentiostatic polarization in PEMFC's anodic operation environment, the film is stable and there is no degradation of the PANi film. The film has no effect on the performance of the fuel cell. Further effort to improve the performance of conductive polymer coatings and to estimate the long-term performance in actual PEMFC environment is desirable.

Electrochemical impedance spectroscopy investigation of chlorinated rubber‐based coatings containing polyaniline as anticorrosion agent

“…Conducting polymers have been extensively studied in recent years due to a great variety of possible applications in several fields, such as energy storage systems [1][2][3], electrocatalysis [4][5][6], electrodialysis membranes [7][8][9][10], sensors [11][12][13], and anticorrosive coatings [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. They exhibit different oxidation states and behave as electronic or mixed conductors [28].…”

“…Huang et al [42] utilized electrochemically synthesized PAni to protect stainless steel used as a bipolar substrate to proton exchange membrane fuel cell (PEMFC). They described that corrosion potential of steel coated with PAni film has increased from À350 to 250 mV when tested into the simulated solution containing sulfate and chloride ions.…”

The Effect of Electrodeposited PANI on Corrosion Behavior of 316 Stainless Steel Coated by CVD Grown MWCNTs under PEMFC Bipolar Plate Working Condition

“…Numerous groups have reported on the protective effects of these coatings against corrosion (23)(24)(25)(26). These polymers can be coated on SS both chemically and electrochemically.…”

Corrosion protection of stainless steel plates in fuel cells environment by conducting polymers

“…Several researchers have concentrated their efforts in the investigation of the corrosion mechanism of SS and its protection by organic compounds . Some reports show that the heterocyclic compounds like rhodanine azosulpha and substituted pyrazolones inhibit the corrosion of SS in hydrochloric acid and sulphuric acid , respectively.…”