METHOD FOR CHEMICAL CLEANING OF BODY CAVITIES OF WATER-COOLED ASSEMBLIES AND COMPONENTS OF WATER COOLING SYSTEM OF LOCOMOTIVE DIESEL FROM SCALE AND CORROSION DEPOSITS Russian patent published in 2015 - IPC F28G9/00 B08B9/02 

FIELD: chemistry.

SUBSTANCE: method for cleaning involves dividing a heat exchange system on the following circuits: a loop of the diesel water cooling system, a loop of air-water radiator sections of the water cooling system of the locomotive diesel and turbo compressor, a loop of air-water radiation sections of the water cooling system of oil and charging air, a turbo compressor loop, a charging air coolant loop, an oil-water heat exchange loop, an oil heater loop, and an operator's cab heater loop. That is combined with the separate washing of each of the above loops with a washing agent at its temperature of 50-80°C with periodic change in the solution flow direction through the loop cavity, neutralisation of the agent solutions and anti-corrosion treatment. The washing solution is a solution containing, wt %: sulphamic acid - 2-5, ethylene diamine tetraacetic acid disodium salt - 1-1.5, a corrosion inhibitor - 0.1-0.2, water - the rest.

EFFECT: more effective cleaning of the heat exchange systems, higher operability, improved anticorrosion properties of the treated surfaces and safety of the method.

9 cl, 2 dwg, 1 tbl