The　corrosion　behaviour　of　Cu-Sn-Pb　bronze　alloys　in　an　archaeological-soil　medium　was　examined　using　electrochemical　measurements,　microscopy　observations　and　X-ray　photoelectron　spectroscopy　analyses.　The　corrosion　mechanism　was　mainly　composed　of　the　spontaneous　dissolution　of　the　base　alloy　and　the　formation　of　surface　corrosion　products.　Results　showed　that　the　corrosion　rate　decreased　with　increasing　Cu　content,　and　the　79.81Cu-Sn-Pb　has　the　lowest　corrosion　rate　among　four　bronzes　examined　in　this　study.　The　corrosion　products　of　the　alloy　consisted　of　two　layers,　an　outer　layer　of　copper,　lead　oxides　and　metal　chlorides　and　sulphates,　and　an　inner　layer　filled　with　Sn　products.