Abstract: An electrically conductive composite coating comprises a layer of an electrically conductive coating material (101) comprising a carbon-based material and an azole corrosion inhibitor; and a layer of tin or a tin alloy (102), such as tin-antimony (Sn-6 wt % Sb) alloy. The coating material may include an organic binder. The coating may be used to protect a component (100) in an electrochemical device such as a fuel cell assembly, a battery, a redox flow battery, an electrolyser or a supercapacitor. The coating shows no significant sign of corrosion after 9 days in accelerated long term corrosion tests in an aggressive environment.