Acid products are generally used to remove build up of scales and mineral deposits which can dull metal surfaces and may also provide harbourage for bacteria which can adhere to the rough surface of scale. In general acid products will not remove organic soils, but occasionally, matrix soils are present – i.e. where scale, due to its rough surface, has allowed organic soil to build up and form a plaque composed of inorganic and organic deposits. In this case acids will dissolve the inorganic component and allow for the break up and removal of such matrix soils. It is important not to use acid products at the same time as chlorinated products as this can result in the release of chlorine gas – a dangerously toxic gas.
Always check that if acids are being used that there is no chlorinated product residues present in, for example, shared drains.