Abstract
If in a marine diesel engine chromium plated liners are used and if this engine runs on a fuel with a high sulphur content, a difference in potential between the cylinder-wall and the piston can be measured. This potential difference is due to the existence of a galvanic cell formed by the chromium plated wall and the cast iron piston-rings with an acid oil film on the wall as electrolyte. From the results on a test engine could be calculated that an important part of the corrosive wear of the chromium plated liners is due to the action of this cell. Methods for the prevention of this kind of corrosive wear will be mentioned further on.
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