“…While the electro-plating of worn parts with iron [89] and chromium-plating of those repaired or of new linings and pistons are proprietary processes, some technical information is available that is sufficient to indicate the principles involved [90,91]. A detailed report on the development, properties and •application of emulsion oils for low-speed diesel engines was giveri by Van der Zijden and Kelly [92] ten years ago.…”