Preventing sulfur-based corrosion of silver components in fuel systems

Sensors in modern automotive fuel systems often use of silver or silver alloys, which are susceptible to corrosion from sulfur in gasoline. In the past decade, refiners have shifted to producing lower-sulfur gasoline. The process includes more severe hydrotreating, which destroys naturally occurring compounds that give some protection against sulfur-based corrosion. As a result, even low levels of sulfur in gasoline can corrode silver.

In fact, a rash of fuel-sensor failures in mid-2004 was traced to sulfur-related corrosion of silver and copper alloys used in sensors.

Application of AN 933 from GE Water & Process Technologies effectively prevents silver corrosion. It replaces the naturally occurring compounds removed in modern gasoline refining and provides a protective layer on the metal surface. We can identify and apply other corrosion inhibitors from our SpecAid product line to ensure that your finished fuel products meet market and customer specifications.

Note: GE silver corrosion treatment is available only in the U.S., Middle East, and Africa.