The bronzes unearthed from Tomb M35 and M36 at Chenzhuang Site of Gaoqing County, Shandong Province, exhibit special corrosion phenomena, specifically black rust. Analysis of the corrosion products on these bronzes show that 1) the soluble sulfate content of the soil of the two tombs is very high; 2) the content of sulfur in the bronzes is very high; 3) the black rust is a compound of copper and sulfur; 4) the shiny particles are well-crystallized forms of copper and sulfur and the grains are parallel plate-shaped aggregates; 5) there is a lot of “copper” present, and the microstructures of the pure copper particles and the pure copper sheet are the same as that of compound of copper and sulfur; 6) the green tone and green rust spots on the bronzes ware were caused by the crystallization of sulfate minerals; 7) a copper-tin alloy is contained in the yellow white and gray white rust on the surface of matrix and 8) chloride ions are rarely detected in bronzes.