ISO 4404-1-2012 pdf free download.Petroleum and related products – Determination of the corrosion resistance of fire-resistant hydraulic fluids一 Part 1: Water-containing fluids.
8.1.4 Allow the solvent to evaporate, then quickly transfer the specimens to a desiccator (6.12) for 24 h to 36 h.
8.1.5 Immediately before use, weigh the test strips and record their mass Lathe nearest 1 mg.
8.1.6 Fill each of the beakers (6.1) with 250 ml of the homogenized test fluid.
8.1.7 When testing individual metals, suspend single test strips of steel, copper, zinc, aluminium and brass on glass hooks (6.5) below the watch-glass covers so that 60 mm ± 2 mm of their entire length is immersed in the test fluid (see Figure 1).
NOTE These single test strips can also be suspended with the spacer (6,15) and the bolt (6.16).
8.1.8 When testing metal pairs, suspend the following combinations of test strips in the test fluid as described in 8.1.7 above:
a) steel and zinc:
b) copper and zinc;
c) zinc and aluminium;
d) aluminium and steel.
8.1.9 Using shims (6.7), suspend these pairs of test strips on glass hooks (6.5) below the watch-glass covers so that 60 mm ± 2 mm of their length is immersed in the test fluid and so that, by means of the spacer (6.15), the distance between the strip surfaces is 1 mm.
8.1.10 Keep one beaker (6.1), containing the test fluid and covered by the watch glass, free of test strips to evaluate the changes in the fluid during the test.
8.2 Test
8.2.1 Place all ten beakers in the heating bath or oven (6.6). Maintain the temperature of the test fluid at
35°C±1 °C.
8.2.2 Leave all the beakers undisturbed in the heating bath or oven for a period of 672 h ± 2 h (equivalent to
28 days).
8.3 Assessment
8.3.1 After completion of the test, visually inspect the test strips and the test fluid under normal light (approximately 646 lux) and assess the following:
a) test strips:
general appearance;
— deposits formed.ISO 4404-1 pdf download.