1. Rationale
Currently the D1743 method specifies the use of ASTM D1193 type III water. There has never been a research report filed to support the current precision statement in the method, so it is unknown what water quality was used to generate the precision statement. The originally published method from 1960 specified the use of distilled water. It is unknown to the subcommittee at what point the water specification was changed. It is difficult to produce and expensive to buy water meeting the ASTM D1193 type III specification. Also this type of water has a short shelf life after its container is opened. In addition the test methods called for in D1193 to confirm the water meets the type III specification are not readily available to most labs, leading to uncertainty in the water quality being used to run this test by the users of the method. If the original intent of the method was to use distilled water, ASTM D1193 states that Type II reagent water was intended to characterize product water from distillation processes. It seems that type II would be the correct water to specify rather than the currently specified type III. For these reasons a work item will be created to revise section 7.2 removing the reference to ASTM D1193 type III water and replacing it with freshly boiled double distilled water or water conforming to Specification ASTM D1193, Type II.
Keywords
bearing; corrosion; lubricating grease; rust
Citing ASTM Standards
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