Acid rain causes chemical deterioration on carbonate stones and formation of soluble Ca2+, HCO3-, SO4 2-.on the surfaces of stones contributes to salt enrichment on carbonate stones and plays a major role in the deposition of acid substances on buildings. the results showed the corrosion was directly correlated with local pollution, especially the ratio of SO2/NOx and climate.Acid rain speed up the natural chemical weathering and corrosion of exposed materials in a variety of ways like ferrous metals are attacked by SO2 and other structures built of iron are very seriously affected by air pollution with extensive economic losses. The corrosion rate is faster in polluted urban and industrial air particularly in the presence of high concentrations of SO2 than in the countryside. Form calcium sulphate. This is soluble and the acids so formed are washed off from the surface of the stone when it next rains and damages the world’s cultural heritage, ancient monuments, historic buildings, sculptures, ornaments, and other important cultural objects.