CHANGING CHEMISTRY OF EXHAUST GAS: HOW WILL IT AFFECT CORROSION?

Catalytic converters may influence internal exhaust system corrosive conditions to a greater extent than expected, but for reasons other than those commonly considered. While total effects on component deterioration are not known with assurance, some insight has been obtained from available data. Catalysis introduces two additional effects to a preexisting internal corrosive-oxidative environment. These are an increased exhaust gas temperature (metal temperature), and an increased likelihood of formation of sulfuric and possibly other acids. Both effects are due to the oxidizing, catalyzed reactions taking place on the exhaust gas stream in the converter. These effects also vary considerably in extent with converter type (monolithic or pelletized) and vehicle (engine) operating conditions.

Media Info

  • Pagination: p. 34-37
  • Serial:
    • Automotive Engineering
    • Volume: 86
    • Issue Number: 11
    • Publisher: Society of Automotive Engineers
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00196279
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Sep 15 1979 12:00AM