“The addition of a metal passivator is the mitigation technique that has been used to the largest extent in order to minimize the risk of corrosive sulphur. Metal passivators have a long history of use in mineral oil, mainly in lubricating oil but also, to a more limited extent, in insulating oil. They have been used not only to counteract corrosion, but also to improve oxidation stability and to suppress streaming electrification. It is essential to monitor the passivator content during service.”

(Quote from IEC 60422)

What method is used to analyze the sample?

IEC 60422

How do you interpret the results?

IEC 60422

What do the results indicate?

The level of passivator present can help determine resistance to corrosion or may indicate the presence of corrosive contaminants.

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