| 摘要 |
The present invention provides a chemical solution and method which, when introduced into the cooling system of a liquid cooled engine, removes oxidized material such as sludge and rust by chemical reduction without draining or flushing the cooling system. The solution comprises a liquid carrier, such as water, which is miscible with the liquid of the cooling system, phosphoric acid and zinc oxide. The carrier constitutes about 70 percent by weight of the chemical solution, the phosphoric acid constitutes about 26-27 percent by weight of the solution and the zinc oxide constitutes about 3-4 percent by weight of the solution.
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