Texture and Corrosion Behavior of Thin Nickel Sheet Formed by Pulse Plating and Cold Rolling

摘要

Thin nickel sheets were fabricated by electroforming, and cold rolled to improve their strength. The thin nickel sheets have very fine grains with a {001}(uv0) fiber texture. Cold rolling results in evolving a {001}(110) orientation and the formation of a weak {111}(uvw) fiber component. Micro-hardness of the nickel sheet on the surface normal to the normal direction (ND) was increased from 247.8 to 354.4 Hv by cold rolling with 87.5% reduction. The corrosion potential and corrosion rate of the nickel sheet in artificial sea water were in the ranges of -27 to -12mV_(SCE) and 4.2 × 10~(-7)-1.8 × 10~(-6)Acm~(-2), respectively. The change in corrosion behavior with cold rolling on the surface normal to ND has little relation to crystallographic texture because of a stable {001} texture during rolling, unlike nickel bulk samples.