EN ISO 7253-2002 - Determination of resistance to salt spray.

This international standard regards the sampling and testing of paints, varnishes and related products.

The test solution is obtained by dissolving sodium chloride in water to produce a concentration of 50 ± 5 g/l, which must have a pH such that the solution spray inside the cabin has a pH between 6.5 and 7, 2. Any pH changes can be made with the addition of hydrochloric acid, sodium or sodium bicarbonate. The salt and the water must be free of impurities. Before placing the solution in the tank it is good to remove any solids that could clog the nozzle of the spray device.

The test panels have dimensions of 150 mm x 100 mm x 1 mm and they must be coated with the test product. Before the test, they must be left under particular conditions at temperature of 23 ± 2°C and relative humidity of 50 ± 5% for at least 16 hours and they must not be exposed to direct sunlight.

The panels must be placed inside the cabinet in such a way as not to be directly affected by the spray solution. They must be placed upward with an angle of between 15 ° and 25 ° to the vertical, and they must not be in contact either with each other or with the walls of the cabinet.

The temperature inside the spray cabinet must be 35 ± 2°C.

Once that height of spray towers has been adjusted, once other conditions are set and test panels are arranged inside the cabinet, it is possible to start the flow of test solution through the nozzle. The spray is constant and must be continuous for the whole test period, with the exception of a short daily interruption to inspect the device or for entering the solution in the tank. The solution that has been sprayed must not be reused.

At the end of the test period you can remove the panels, that must be cleaned with clean and warm water to remove residues from the surface solution. Once they are dried, the surfaces can be examinated.

Material type Standard Test method
finishing plasters EN 998-1
  •  
skim coats EN 998-1
  •  
screeds EN 13813
  •  
self-levelings EN 13813
  •  
restoring EN 1504-3
  •  
grouting mortars EN 13888
  •  
waterproofing EN 14891
  •  
paints/varnishes - EN ISO 9227

 

Instruments used to perform the test: Salt fog cabinet

 

It is performed by subjecting samples to the continuous action of salt spray.The test is performed by subjecting samples to the continuous action of salt spray.The test is performed by subjecting samples to the continuous action of salt spray.

The test is performed by subjecting samples to the continuous action of salt spray.

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