The standard that should be followed for salt spray corrosion test of color coated board products

Since the national standard for color-coated board product inspection has not been officially released, the neutral salt spray test standard adopted by domestic color-coated board manufacturers or coating suppliers is mainly GB/T 1771-1991 (color paint and varnish resistant to neutral salt spray) Determination of performance), ASTMB117-1997 (test method standard salt spray test),

In the standard GB/T1771-2007 and ASTM B117-2011, the specific conditions for the test conditions are as follows:

GB/T1771-2007 standard requirements: salt solution concentration 50 ± 10g / L, pH 6.5 ~ 7.2, spray volume 1 ~ 2ml / 80cm2 · h, spray pressure 70 ~ 170kPa, spray chamber temperature 35 ± 2 ° C.

ASTM B117-2011 standard requirements: salt solution concentration 5 ± 1%, pH 6.5 ~ 7.2, spray volume 1 ~ 2ml / 80cm2 · h, spray pressure 69 ~ 172kPa, spray chamber temperature 35 ± (1.1 ~ 1.7) ° C.

It can be seen from the test conditions listed in the above salt spray corrosion test chamber standard that the two standards have basically the same requirements for the main test conditions, which guarantees the consistency of the test results of different laboratories in implementing different standards.

The standard that should be followed for salt spray corrosion test of color coated board products

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