ASTM D1384 Test Method for Corrosion Test for Engine Coolants in Glassware
11. Report
11.1 Report corrosion weight loss as a positive value and weight gain as a negative value. If no sign is given to the value it will be interpreted as a weight loss. Example: Initial weight of a brass specimen after cleaning was 405 mg. At the end of test after cleaning it was 398 mg. The cleaning blank was determined by taking the weight of a brass specimen after the initial cleaning, 406 mg, and then cleaning it alongside of the brass specimen removed at the end of the test, 404 mg. Using the equation below, calculate the weight change of the specimen.
(Initial weight - end of test weight) - (Cleaning blank - cleaning blank recleaned alongside of end of test specimen) = Final reported weight change
(405 mg - 398 mg) - (406 mg - 404 mg) = 5 mg (positive value means that it is a weight loss)
11.1.1 Report the corrected corrosion weight changes of individual specimens to the nearest 1 mg for each test.
11.2 Report the average corrected metal weight change for triplicate tests on each engine coolant solution. A single weight change that appears completely out ofline should be dealt with as described in Practice E 178.
12. Precision and Bias
12.1 As indicated in 1.1, this test method is intended only as a rough screening tool. Corrosion tests of this type are inherently lacking in precision and bias, and specific weight-change values for metal specimens cannot be interpreted closely. For information on significance of tests and interpretation of results, reference should be made to Appendix X1. A statistical analysis of the data in Appendix X1 is in progress.
13. Keywords
13.1 engine coolants; glassware corrosion test
