SAE AMS 1428K:2018 pdf free
SAE AMS 1428K:2018 pdf free.Fluid, Aircraft Deicing/Anti-lcing, Non-Newtonian
The fluid, diluted 1:1 by volume with standard hard water made up as in 3.2.2.8.1 and aged as in 3.2.2.8.2, shall show no evidence of insoluble deposits after inversion, and the pH shall not vary by more than +1.0 unit from an unheated reference sample. If the refractive index has increased by more than 0.0020 at 20 °C±2 °C (68 °F±4 °F) from the reference sample, the test is invalid as water has been allowed to evaporate during the test. A sample of the diluted test fluid, after hard water stability testing, shall be tested in accordance with AS5901 (WSET only) using one set of three plates, and the results reported.
At the option of the user, the vendor shall demonstrate that fluid as supplied or in intended use dilutions and heated to intended use temperatures, applied through commercial deicing/anti-icing vehicle systems to an inclined flat or curved surface, preferably an aircraft wing or horizontal stabilizer, at pressures and flow rates normal for the intended use, does not cause foam which does not rapidly collapse, and fluid surface shall not have the appearance of snow or slush.
Cold Storage Stability (to simulate the stablity of the fluid cycling between cold temperature and room temperature)
Prior to the start of this test, the sample shall be visually examined to determine freedom from insoluble deposits. Report any evidence of these factors. Determine the pH in accordance with 3.2.1.3. Determine the refractive index in accordance with 3.2.1 .4. Determine the viscosity in accordance with 3.2.3.2, ASTM D2196, Method B, except the sample shall not be shaken, using a Brookfield LV viscometer or equivalent, fitted with the guardleg and appropriate spindle for the speed selected. Values shall be taken at a spindle speed of 0.3 rpm at 20 °C±2 °C(68 °F±4 °F). The report shall clearly state the size and type of spindle used.SAE AMS 1428K pdf free download.
