What standards should be followed in the coating industry for salt spray testing?

What standards should the paint industry follow when doing salt spray tests?

涂料行业做盐雾试验时应遵循哪些标准

Most of the neutral salt spray test standards used in the coatings industry are GB/T1771-1991 (determination of neutral salt spray resistance of paints and varnishes), ASTMB117-1997 (test method standard salt spray test).

In the standard GB/T1771-2007 and ASTMB117-2011, 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.

ASTMB117-2011 standard requirements: salt solution concentration 5 ± 1%, pH value 6.5 ~ 7.2, spray amount 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.

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