Electro Polymerization of Polypyrrole Coatings Doped with Different Proton Acids for Corrosion Protection of 304 Stainless SteelLi Jiang, Haibo Ma, Jiaqi Zhang, Yu Lu, Hongbin Lu and Xiangkang MengMATEC Web Conf., 109 (2017) 03007DOI: https://doi.org/10.1051/matecconf/201710903007