Replies to post #24786 on SiNtx Technologies Inc (SINT)

[boston745]

Galvanic corrosion of metal/ceramic coupling

The galvanic corrosion risk of metal/SiC-based ceramic coupling in 3.5 wt% NaCl aqueous solution is investigated. Electrochemical measurements as linear sweep voltammetry and galvanic corrosion tests according to DIN-50919 were used. The results clearly show that the resistivity of the SiC-based ceramic plays the key role in the understanding of galvanic corrosion between metal and ceramic. In all cases the ceramic represents the cathodic site of the coupling. The corrosion rate is dominated by the electrical resistance of the ceramic.

Could this be what's going on with ZTA and increased metal corrosion? I didnt realize ceramics could cause galvanized corrosion too. Wouldnt metal based ceramics be more prone to this issue? This would explain metalosis in CoC hip implants without liner failure.

Wouldn't this make coatings even more important?