Browse Prior Art Database

Parallel Flow Atmospheric Corrosion Test

IP.com Disclosure Number: IPCOM000121048D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Calvo, JR: AUTHOR [+3]

Abstract

Gaseous environmental testing is an accelerated life test developed to provide a method for electrical equipment evaluation simulating atmospheric conditions at various levels of operating conditions.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 74% of the total text.

Parallel Flow Atmospheric Corrosion Test

      Gaseous environmental testing is an accelerated life test
developed to provide a method for electrical equipment evaluation
simulating atmospheric conditions at various levels of operating
conditions.

      A system is described for a gaseous environmental testing
system whose primary features are its outer chamber and rotating
inner sample carriage.  Conventional gaseous environmental systems
circulate the pollutant atmospheres using fans while holding the test
specimen rigid.  In the Parallel Flow Atmospheric Corrosion Test
(PFACT), samples are fastened to the rotating inner cylinder and the
pollutants are fed tangentially through a narrow rectangular conduit
with a known velocity profile in the axial direction to minimize the
entrance and exit effects on the circular flow.

      The basic design incorporates several pieces of existing
technology into a uniquely designed test chamber. The basic
components are: variable speed motor drive system, minimum profile
gas introduction and exhaust system, test chamber including shaft
seal and access door, and sample carriage including sample mounts and
balance mechanism.  Although the basic geometry and components are
not new, they are unique in their application to gaseous
environmental test chambers.

      The PFACT system provides control over a wide range of
pollutant velocities without the need for increased pollutant gases
flowrate.  Variable gas velocity...