For the armor-wire structure of submarine cable, a thin layer having good characteristics of anticorrosion and abrasion resistance is required as the surface layer of the armor wire. This paper describes on the plastisol-coated steel which is coated with uniform plastisol layer of about 0.3mm thickness.
Adhesiveness between the plastisol layer and steel wire was measured, and the result showed strong resistance to peeling-off. Weatherometer test, outdoo exposure test and immersion test in sea water have been continued for several years, and no defect due to deterioration of the material was found out. It was considered that pinholes, if any, which may be occasionally formed in the manufacturing process would be sealed up by the so-called “electrocoating phenomenon.” The result of investigation on the mechanical properties of this layer showed a good abrasion resistance in case of being pressed by small force such as exerted by fine sand.
It was concluded that submarine cable having this armor wire had good performances owing to its anti-corrosive characteristics in the circumstances of sea bottom for long terms, the mechanical strength being not affected by elongation and rotation of the cable, and also it had economical superiority.

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