QB/T 2002.1-2018 English PDF (QBT2002.1-2018)

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QB/T 2002.1-2018: Hardware fitting ofleather products-Specification of electroplated layer
QB/T 2002.1-2018
QB
LIGHT INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 59.140.35
Classification number. Y 48
Registration number. 63696-2018
Replacing QB/T 2002.1-1994
Hardware fitting of leather products -
Specification of electroplated layer
ISSUED ON. MAY 08, 2018
IMPLEMENTED ON. SEPTEMBER 01, 2018
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Requirements ... 6 
5 Test methods ... 7 
6 Inspection rules ... 7 
Hardware fitting of leather products -
Specification of electroplated layer
1 Scope
This part of QB/T 2002 specifies the terms and definitions, requirements, test
methods, inspection rules for the electroplating layers of hardware fitting of
leather products.
This part applies to all kinds of electroplating layers of hardware fitting of leather
products. The electroplating layers of other base materials can make reference
to this part.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
QB/T 3821-1999 Adhesion testing method of the metal deposits for the light
industrial products
QB/T 3826 Corrosion-resistant testing method of the metal deposits and
conversion coatings for the light industrial products - Neutral salt spraying
test (NSS)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Varnish
A solid-state continuous film the painting solution of which is applied to the
surface of the plating to form a protective plating.
3.2
Pockmark
4.1.4 The pattern and text are clear.
4.2 Bonding strength of electroplating layer
The plating shall not be lifted or peeled off.
4.3 Adhesion of varnish
The varnish does not fall off.
4.4 Corrosion resistance
The number of corrosion points is not more than 3, meanwhile the area of a
single corrosion point is not more than 1 mm2.
5 Test methods
5.1 Appearance quality
Perform visual inspection in good lighting conditions.
5.2 Bonding strength of electroplating layer
Perform testing according to the scratching method in 2.3 of QB/T 3821-1999.
5.3 Adhesion of varnish
Use a stylus or steel needle which has a radius of curvature at the needle tip of
0.013 mm ~ 0.018 mm, in the direction perpendicular to the length of the sample,
to make 6 parallel scratches (length of about 5 mm) along the surface of varnish,
at a spacing between scratches of 1 mm. The stylus or steel needle shall
penetrate the overall depth of the varnish. Then make 3 scratches which are
perpendicular to the previous 6 scratches, at the length of about 8 mm and the
spacing of 1 mm, to form 10 small grids. Use hands to gently touch them.
Observe the peeling of varnish.
5.4 Corrosion resistance
Carry out testing according to QB/T 3826. The test period is 16 h.
6 Inspection rules
6.1 Group-batch
The products of same type which are produced by the use of the same variety
of raw materials according to the same production process form an inspection
batch.