Marble Statue Acid Rain

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Marble statue acid rain.

Many monuments are made from limestone marble and bronze materials that can be altered or slowly dissolved by acid precipitation. Marble with its larger crystals and smaller pores can attain a high polish and is thus preferred for monuments and statues. Acid rain has not gone away but it has gotten somewhat better. Acid rain is a threat to both natural areas and to our national monuments and memorials.

Acid rains are one of the main degradation agents for marble artifacts. When sulfurous sulfuric and nitric acids in polluted air react with the calcite in marble and limestone the calcite dissolves. Although many different types of stone have been used for sculpture the most vulnerable to potential acid rain damage are marble and limestone steiger 2015 the former is essentially a recrystallized form of the latter. Figure 4 18 acid rain damage to a statue of george washington.

When sulfurous sulfuric and nitric acids in polluted air and rain react with the calcite in marble and limestone the calcite dissolves. How does acid precipitation affect marble and limestone buildings. Both are composed of calcite caco 3 other types of stone which are composed of silicate minerals such as granite or sandstone are intrinsically more resistant to acid attack. Acid rain contains carbonic nitric and sulfuric acid that are produced by oxidation and dissolution in water of gaseous oxides co 2 no 2 and so 2 present in the air as chemical pollutants.

Marble like all calcareous rocks is particularly sensitive to degradation by acid chemicals and to weathering. Acid precipitation affects stone primarily in two ways. Both marble and limestone consist of caco 3 which reacts with acid rain in an acid base reaction to produce caso 4. In exposed areas of buildings and statues we see roughened.

Dry deposition of acidic compounds can also dirty buildings and other structures leading to increased maintenance costs. Stone surface material may be lost all over or only in spots that are more reactive. The effects of acid rain to marble statues what may happen with acid rain. Ever wondered if it s still around.

In exposed areas of buildings and statues we see roughened surfaces removal of material and loss of carved details. Acid rain can ruin buildings and statues by stripping away the material and corroding metal that makes up these structures.