Which pipe material is least susceptible to corrosion by acids formed by gases generated in sewers?

Which pipe material is least susceptible to corrosion by acids formed by gases generated in sewers?

• A. Acp
• B. Cip
• C. Vcp
• D. Rcp

Answer: (C)

Sewer gases can produce sulfuric acid when hydrogen sulfide is oxidized in moist conditions. This acid attacks pipe materials differently, so the material that stays most intact under these conditions is the one with chemical and mineral composition that resists acid attack. Vitrified clay pipe is highly resistant to sulfuric acid due to its ceramic, glazed surface, which is essentially inert to acids found in sewer environments. This makes it the least susceptible to corrosion among the common options. In contrast, asbestos cement can degrade in acidic conditions, cast iron corrodes readily in the presence of sulfides and acids, and reinforced concrete deteriorates as the cement paste and any steel reinforcement are attacked by the acid. So, the best choice is vitrified clay pipe, because its ceramic composition and glaze provide superior resistance to sewer gas acids.

Sewer gases can produce sulfuric acid when hydrogen sulfide is oxidized in moist conditions. This acid attacks pipe materials differently, so the material that stays most intact under these conditions is the one with chemical and mineral composition that resists acid attack.

Vitrified clay pipe is highly resistant to sulfuric acid due to its ceramic, glazed surface, which is essentially inert to acids found in sewer environments. This makes it the least susceptible to corrosion among the common options. In contrast, asbestos cement can degrade in acidic conditions, cast iron corrodes readily in the presence of sulfides and acids, and reinforced concrete deteriorates as the cement paste and any steel reinforcement are attacked by the acid.

So, the best choice is vitrified clay pipe, because its ceramic composition and glaze provide superior resistance to sewer gas acids.