4 Apparatus4.1 Component protection

4 Apparatus4.1 Component protectionAll components in contact with the spray or the test solution shall be made of, or lined with, materials resistant to corrosion by the sprayed solution and which do not influence the corrosivity of the sprayed test solutions.4.2 Spray cabinetThe cabinet shall be such that the conditions of homogeneity and distribution of the spray are met. The upper parts of the cabinet shall be designed so that drops of sprayed solution formed on its surface do not fall on the specimens being tested.The size and shape of the cabinet shall be such that the collection rate of solution in the cabinet is within the limits specified in Table 2, measured as specified in 8.3.Preference shall be given to apparatus that has a means for properly dealing with fog after the test, prior to releasing it from the building for environmental conservation, and for drawing water prior to discharging it to the drainage system.NOTE A schematic diagram of one possible design of spray cabinet is shown in Annex A.4.3 Heater and temperature controlAn appropriate system maintains the cabinet and its contents at the specified temperature (see Table 2). The temperature shall be measured at least 100 mm from the walls.