Analytical instrumentation
Eliminate BIAS in Silver Corrosion Ratings
Dec 18 2015
Sensors in modern automative fuel systems often use silver or silver alloys, which are susceptible to corrosion from sulfur in gasoline. In the past decade, refiners have shifted to producing low-sulfur gasoline, but the process requires more severe hydro-treating that destroys naturally occuring compounds that give some protection against sulfur-based corrosion.
Ensuring that fuel stays within acceptable limits requires constant and accurate testing. Unfortunately, modern testing methods rely heavily on user bias, as the operator must evaluate corrosivity by interpreting the color and tarnish level of a of silver strip after it has been bathed in a fuel sample.
AgDDI, from Ayalytical Instruments (USA), uses a four-step automated vision algorithm and classification process to eliminate user bias. After evaluating the silver strip for corrosivity, the algorithm assigns the sample an integer between 0 and 4, with 0 being no corrosion at all and 4 showing significant blackening. AgDDI provides standardization to the current visual determination as referred in ASTM D7671 and gasoline fuel specification ASTM D4814.
Digital Edition
PIN 26.1 Feb/Mar 2025
March 2025
Analytical Instrumentation - Elemental Analysis for Quality and Process Control at Refineries, for Lubricants and Wear Metals in Engine Oils - Synthetic Lubricants: New Developments - Scaling...
View all digital editions
Events
Mar 12 2025 Almaty, Kazakhstan
Mar 12 2025 Montreal, Canada
Mar 17 2025 Houston, TX, USA
Mar 18 2025 Beijing, China
Mar 19 2025 Manila, Philippines