MARINE CORROSION TESTS OF ELECTROPLATES FOR SHIP INSTRUMENTS - VI - PROTECTIVE AND DECORATIVE PROPERTIES AND SERVICE LIFE OF CHROME-PLATED STEEL

The protective and decorative properties of chromium electroplates on steel 10-matte (24 and 36 mu m thick), hard (common, 48 and 60 mu m an d phosphated, 9 and 18 mu m, including those treated with a hydrophobi zing liquid) - were tested in containers, which simulate the instrumen tal cases of water-tight and splash-proof types. Outdoor tests were ca rried out for 14-20 years on the sea-coast in three zones with cold (M urmansk), temperate humid (Vladivostok), and warm humid (Batumi) clima tic conditions. Protective properties of the electroplates were assess ed visually in relative classes and by weighing; their appearance was estimated visually in relative classes. The service life of electropla tes in ship instruments was specified.