Corrosion study of metal particle, metal film, and Ba-ferrite tape

The authors investigated the corrosion susceptibility of very high coercivity metal particle (MP) and metal evaporated (ME) tapes and Ba-ferrite tapes when exposed to 50 degrees C and 80% RH for 7.5 weeks. The tapes are used in 8-mm video and digital audio tape applications. The effects of corrosion were studied by measuring the error statistics at a density of 53 kfci (2100fc/mm) using an 8-mm helical scan recorder with MIG heads. A large increase in errors was observed for all the MP and ME tapes studied (typically by two orders of magnitude), but also a large variation in corrosion stability among the tapes from different manufacturers.<
>