| 摘要 |
The deposits are esp. of Fe, Ca, Mn and/or resinous materials and a high pressure sprayed soln. of an aliphatic carbonic acid is used. The aq. soln. contains esp. 1-2% of L-ascorbic acid with 1-2% alcohol, 1-2% of a wetting agent and 1-2% of other org. acids. In addition 1-2% of disinfectant and 0.1-1.0% of a suitable inhibitor may be included in the soln. Compressed atmos. air is used for pressurisation from a hand or motor pump or from a compressed air bottle. The drum used in mounted on a trolley and has quick release couplings for the air connection and for the spraying lance hose. |
