The carbon fibre reinforced polymer/uncoated Mg laminates suffer serious corrosion in NaCl solution. The corrosion products are not effective in protecting magnesium alloys from dissolution. Micro-arc oxidation coatings on Mg greatly improve the carbon fibre reinforced polymer/Mg laminates. The corrosion rate of carbon fibre reinforced polymer/Mg laminates is lower compared with the Mg alloys.