GB/T 33229-2016 English PDF (GBT33229-2016)

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GB/T 33229-2016: Coated aluminum and aluminum alloy strips for electrical components
GB/T 33229-2016
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
H 61
Coated aluminum and aluminum alloy strips
for electrical components
ISSUED ON: DECEMBER 13, 2016
IMPLEMENTED ON: NOVEMBER 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Requirements ... 6 
5 Test methods ... 9 
6 Inspection rules ... 12 
7 Marking, packaging, transportation, storage, quality certificate ... 15 
8 Order (or contract) content ... 16 
Coated aluminum and aluminum alloy strips
for electrical components
1 Scope
This standard specifies the terms and definitions, requirements, test methods,
inspection rules, marking, packaging, transportation, storage, quality certificate,
order form (or contract) of coated aluminum and aluminum alloy strips for
electrical components.
This standard applies to aluminum and aluminum alloy polyurethane roller
painted strips (hereinafter referred to as coated strip) which are used for
packaging the enclosures of such electrical components as solid capacitors,
liquid capacitors, chip capacitors, film capacitors, electrolytic capacitors, lithium
batteries.
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.
GB/T 3190 Wrought aluminum and aluminum alloy - Chemical composition
GB/T 3199 Wrought aluminum and aluminum alloy products - Packing,
marking, transporting and storing
GB/T 3880.3 Wrought aluminum and aluminum alloy plates, sheets and
strips for general engineering - Part 3: Tolerances on forms and dimensions
GB/T 5125 Method for deep drawing cups testing of non-ferrous metals
GB/T 6739 Paints and varnishes - Determination of film hardness by pencil
test
GB/T 6742 Paints and varnishes - Bend test (cylindrical mandrel)
GB/T 7999 Optical emission spectrometric analysis method of aluminum and
aluminum alloys
GB/T 8005.3 Aluminum and aluminum alloys - Terms and definitions - Part
3: Surface treatment
GB/T 8013.3 Anodic oxide coatings and organic polymer coatings on
aluminum and its alloys - Part 3: Organic polymer coatings
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 9286 Paints and varnishes - Cross cut test for films
GB/T 9753 Paints and varnishes - Cupping test
GB/T 16865 Test pieces and method for tensile test for wrought aluminum
and magnesium alloys products
GB/T 17432 Methods for sampling for analyzing the chemical composition
of wrought aluminum and aluminum alloys
GB/T 20975 (all parts) Methods for chemical analysis of aluminum and
aluminum alloys
GB/T 22638.4-2016 Test methods for aluminum and aluminum alloy foils -
Part 4: Determination of surface wetting tension
GB/T 23989-2009 Determination for the solvent resistance of coatings by
solvent rubs
GB/T 26296 Defects for anodic oxide coatings and organic polymer coatings
on aluminum and its alloys
GB/T 26492.3 Defects for wrought aluminum and aluminum alloys ingots
and products - Part 3: Defects for plates, sheets and strips
3 Terms and definitions
The terms and definitions as defined in GB/T 26296, GB/T 26492.3, GB/T
8005.3 as well as the following terms and definitions apply to this document.
3.1
Thermo viscidity
The viscosity of the polymer when it reaches a certain temperature.
Resistance to acid and
alkaline It is free of black spots, white spots, blistering, peeling off
Heat resistance In visual observation, the film is free of yellowing or discoloration
Surface wetting tension When using No.34 Dyne, the scratch does no shrink
Insulation At AC 800V, there is no breakdown (withstand voltage tester does not alarm)
Thermo viscidity In visual observation, the film is free of adhesion marks
Resistance to cup-drawing The film shall, after being subjected to the cup-drawing test at a compression depth of 5 mm, be free of cracking or peeling off
Bending resistance In visual observation, the film is free of cracking or peeling off
4.7 Appearance quality
4.7.1 It is not allowed for the substrate surface to have surface bubbles, water
marks, impression marks, bumps, holes, non-metallic indentations, metal
indentations, dents, creases, crimps, knife marks, scratches, roller marks,
scratches, rolling damage, oil spots, corrosion, pine-shaped patterns, ribs,
yellow spots, black strips, roller flowers, embossing, light and dark stripes,
sticky marks.
4.7.2 The surface of the substrate is allowed to have defects such as
inconspicuous vibration lines that do not affect the use.
4.7.3 It is not allowed for the surface of the coated strip to have bubble spots,
fracturing, yellowing, orange peel, fat edge, shrinkage hole, bottom exposure,
color difference, black strip, miscellaneous point (particle), mixed color, flowing
mark, knife mark, scratch.
4.7.4 The coated strip shall be wound up and rolled tightly and neatly. It is not
allowed for the end surface to be scratched or damaged. It is not allowed for
the side part to be cracked, curled, or have filamentous burrs.
4.7.5 It is not allowed for the coated strip to have collapse or bird's nest.
4.7.6 It is not allowed for the coated strip to have joints.
5 Test methods
5.1 Chemical composition
5.1.1 The analytical method for the chemical composition of the substrate shall
comply with the provisions of GB/T 20975 or GB/T 7999. The arbitration
analysis shall adopt the method as specified in GB/T 20975.
5.1.2 The calculation of “Al” content shall be in accordance with the provisions
of GB/T 3190. When calculating the “Al” content, take the sum of the analytical
Follow the determination method of local film thickness as specified in GB/T
8013.3 to make determination.
5.5.2 Pencil hardness
The pencil hardness testing of the film layer is carried out in accordance with
the provisions of GB/T 6739. Observe whether the surface film is scratched.
5.5.3 Dry adhesion
5.5.3.1 According to the provisions of GB/T 9286, first draw 11 parallel lines on
the specimen. Then draw 11 lines perpendicular to these parallel lines. The
spacing between parallel lines is 1 mm.
5.5.3.2 Cover the adhesive tape1) which has an adhesive force of more than 10
N/25 mm on the cross-cut film layer. Rush off the air under the adhesive tape.
Quickly pull off the adhesive tape vertically. Grade it according to GB/T 9286.
5.5.4 Resistance to boiling water
Inject the clean water into the beaker (it should use tap water). The height of
the water is about 100 mm. The water is heated to the temperature of 95 °C ±
3.0 °C. Completely immerse the 80 mm long specimen in water. After placing it
for 20 min, remove it. Wipe the specimen dry. After cooling it to room
temperature, use visual observation to check the surface of film (except for the
peripheral portion of the specimen).
5.5.5 Solvent resistance
The test of solvent resistance of the film layer is carried out according to the
provisions of 7.1 or 7.2 of GB/T 23989-2009. The arbitration method is carried
out according to the provisions of 7.2 of GB/T 2398...