18-20 YEAR CORROSION TESTS OF ELECTROPLATES FOR SHIP INSTRUMENT ENGINEERING IN A MODERATE-COLD MARINE CLIMATE .1. CHOICE OF COATINGS, TESTING PROCEDURE, CLIMATE, AND AEROCHEMICAL CONDITIONS AT TESTING PLACES

Various types of metal coatings can be used in ship instruments depend ing on the requirements of products and their parts (Lifetime, appeara nce, corrosion resistance, contact to dissimilar metals, friction, con stancy of contact resistance, etc.). Special tests are necessary to es timate the corrosion-protection effectiveness and economic efficiency of the coatings. Beginning in 1976, the Institute of Physical Chemistr y of Russian Academy of Sciences has been carrying out a program of fu ll-scale corrosion testing of 47 protective systems (one- and multi-la yer electroplates of anodic and cathodic type, including those with fl ow-brightening, additional conversion layers, lacquer films, and other s) in a marine climate as applied to ship instruments. In this part of the work we consider the types of tested electroplates, their purpose ,,stoups of operating conditions, corrosion testing procedure, and env ironmental characteristics.