Effect of organically modified sepiolite as inorganic nanofiller on the anti-corrosion resistance of epoxy coating

[Display omitted] •A new inorganic nanofiller SEP is firstly used in the field of anti-corrosion.•The hydrophilic surface of SEP is modified into a hydrophobic material.•The modified OMSEP fibers improve the corrosion resistance of EP coating. We report a new inorganic nanofiller sepiolite (SEP), which is modified by acid and coupling agent KH570. The different content of organically modified sepiolite (OMSEP) fibers are then added into the epoxy resin (EP) matrix. The results reveal the corrosion resistance of EP coating improved significantly with the addition of OMSEP. When containing 3 wt% OMSEP, the EP coating has the best corrosion resistance. The impedance at low frequencies of the 3 wt% OMSEP coating immersed for 72 h is three orders of magnitude higher than the 6-hour EP coating.