MIL-PRF-24635E
Lead
7421
Mercury
7470 or 7471
Nickel
7520 or 7521
Selenium
7740 or 7741
Silver
7760 or 7761
TABLE VII. Methods for chemical analysis of water and waste,
EPA 600/4-79-020.
Metal/material
Test method
Beryllium
210.1 or 210.2
Cobalt
219.1 or 219.2
Copper
220.1 or 220.2
Fluoride
340.1, 340.2, or 340.3
Molybdenum
246.1 or 246.2
Thallium
279.1 or 279.2
Vanadium
286.1 or 286.2
Zinc
289.1 or 289.2
4.5.1.2.1 Tantalum and tungsten content. The tantalum and tungsten content of the coating shall be determined
using any appropriate spectroscopy test method. The tests shall be conducted in accordance with the equipment
manufacturer's directions for the use of the instrument. The coating manufacturer is responsible for establishing
data justifying the test method choice and analytical accuracy.
4.5.1.3 Hazardous air pollutants content. Formulation data shall be used by manufacturers in lieu of testing to
demonstrate compliance with hazardous air pollutant requirements of this specification. The manufacturer's
formulation data must have a consistent and quantitatively known relationship to the testing required. Calculation of
individual HAP contents can be based on either manufacturer evaluation of batches or supplier data for raw
materials used in the product. The coating manufacturer must provide, for each individual HAP, a formulation value
that will not be exceeded if a sample from any quality control approved production batch of the coating is evaluated
in accordance with this paragraph.
4.5.1.4 Volatile organic content (VOC). VOC for each batch (as described in 40 CFR 63.782) shall be
determined in accordance with 40 CFR 60 Ch.1, Appendix A, Method 24, allowing the sample to reside at 72±2 °F
(22±1 °C) for 24 hours prior to conducting the analysis. No oven heating is allowed.
4.5.2 Type II, III, and IV resin characteristics.
4.5.2.1 Silica (SiO2) content of vehicle. From a stoppered bottle or weighting pipette, the mass shall be
accurately determined by difference, weigh approximately 3 grams of vehicle into a previously ignited and weighted
3-inch (7.6-cm) porcelain evaporating dish. Add 1 milliliter (mL) concentrated sulfuric acid. The sample shall be
dried at 230 °F (110 °C) (nominal) in an oven for 1 hour followed by 1 hour in an oven at 165 °C (329 °F)
(nominal). The dried sample shall be placed in a cold muffle furnace and the temperature shall be gradually
increased over a period of 3 hours to 800 °C (1472 °F). This temperature shall be maintained for an additional hour.
After cooling in a desiccator, the mass of the dish and the contents shall be determined and the percent of silica shall
be calculated as follows:
Mass of ash 100
Percent silica
Mass of sample nonvolatile fraction
This nonvolatile fraction has been determined in accordance with ASTM D2369.
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