GB/T 22638.1-2016 Test methods for aluminium and aluminium alloy foils – Part 1: Determination of thickness
1 Scope
This part of GB/T 22638 specifies the determination method for the thickness of aluminium and aluminium alloy foils.
The gravimetric method specified in this part is applicable to arbitral determination of thickness of non-composite foil with thickness less than 0.10 mm.
The vertical optimeter method specified in this part is applicable to the arbitral measurement of the thickness of composite foil with thickness less than 0.10 mm.
The digital micrometer method specified in this part is applicable to arbitral measurement of aluminum foil thickness with thickness not less than 0.10 mm.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 8005.1-2008 Aluminium and aluminium alloys - Terms and definitions - Part 1: Product and method of processing and treatment
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 8005.1-2008 and the following apply.
3.1
areal density
mass per unit area of aluminum foil
4 Gravimetric method
4.1 Principle
In this part, the thickness and areal density of aluminium and aluminium alloy foils are calculated by weighing the mass of samples of aluminium and aluminium alloy foils with known area and density.
4.2 Apparatuses
4.2.1 Analytical balance: with a sensitivity of 0.1 mg.
4.2.2 Sampler, with quantitative standard and a sample area of 100 cm2.
4.3 Determination
Foreword i
1 Scope
2 Normative references
3 Terms and Definitions
4 Gravimetric method
5 Vertical optimeter method
6 Digital micrometer method
7 Test report
