QB/T 3826-1999: Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products. Neutral salt spraying test (NSS)

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Scope

1.1 The test equipment consists of salt spray chamber, saltwater container,
compressed air supplying (including purifying) system, nozzle, sample frame, heating
and other necessary controlled manners. If the obtained conditions can satisfy the
requirements of this Method, the dimension and structure of the equipment shall not
be confined.
1.2 The structural materials of the test equipment shall not only influence the
corrosion performance of the salt mist; but also is corrosion-resistant.
1.3 No condensed droplets on the top of the salt spray chamber are allowed to drop
onto the sample.
1.4 Baffle is equipped in the salt spray chamber, which prevent the salt mist to jet
onto the sample.
1.5 Minimum two collectors used for cleaning are placed in the exposed area of the
salt spray chamber. One collector is close to the nozzle; while the other shall be placed
at the farthest place away from the nozzle. The placing positions of the collectors are
required in condition that only salt mist rather than the liquid dropped from the sample
or chamber shall be collected. A suitable collector indicates the 10cm-dimameter
funnel or crystal cup inserting into the graduate flask; while the collecting area is 80cm2.
1.6 If the equipment has been tested by a different solution not stipulated in this test,
it must be adequately cleaned before use.

Basic Data

Standard ID	QB/T 3826-1999 (QB/T3826-1999)
Description (Translated English)	Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products. Neutral salt spraying test (NSS)
Sector / Industry	Light Industry Standard (Recommended)
Classification of Chinese Standard	Y73;A29
Word Count Estimation	3,380
Date of Issue	3/11/1986
Date of Implementation	12/1/1986
Older Standard (superseded by this standard)	GB 5938-1986
Adopted Standard	ISO 3768-1976, NEQ; ISO 3770-1976, NEQ
Regulation (derived from)	Industry-Science (2010) No.77
Summary	This standard applies to test the corrosion resistance and chemical treatment of metal plating layer.