Work Item
ASTM WK82786
Revision of D4340-19 Standard Test Method for Corrosion of Cast Aluminum Alloys in Engine Coolants Under Heat-Rejecting Conditions
Rationale
Section 10. Preparation of Test Specimen, gives special importance to necessary preparation of the aluminum test specimen for maximum repeatability and reproducibility. The current steps to follow in section 10 do not differentiate between a used test specimen and a new supplier prefinished specimen so an updating of the preparation process is required to capture current practices. Also, the current polishing process has no screening check of the polished test face for confirmation of removal of such as pits which may have been observed in the surface inspection required in subsection 12.3.
At initiation of testing, the more numerous the surface pit count the greater the likelihood of corrosion product accumulations reducing heat-transfer efficiency and the surface pits contributing to or leading to a bigger test weight loss for some technologies.
Work Item Status
Date Initiated: 07-18-2022
Technical Contact: Henry Owusu
Item: 000
Ballot:
Status: