As an important means of transportation in our life, automobile material testing involves the testing of body, exterior and interior accessories, engine, chassis, painting, tires, automotive electrical and wiring harnesses and other parts and various assemblies.
Plating and coating
A. thickness of metal coating
1. Coulomb method Model: KJ-4000 computer Coulomb thickness gauge.
ASTMB 764-04 GB/T 4955-1997
Measurement range: 0-35μm error is 10%
Scope of application: It can measure the thickness of one-layer plating metal, multi-layer plating metal, multi-layer nickel thickness and potential difference, alloy plating and various electroplated metals on plastics.
Sample requirements: smooth surface, at least 3mm2 test surface
2. Metallographic method
ASTM B487-85 ASTM D1186-01 GB/T 4957-2003
Model: metallographic microscope
Measuring range: 1-100 μ m.
Sample requirements: no special requirements.
3. Eddy current measurement
GB/T4957-2003 ASTM D1400-00
Measuring range: 0.5-200μm,
Sample requirements: the test surface is quite flat.
B. Coating composition analysis and sample surface stain composition analysis
Equipment Name: Electron Probe and Photoelectron Energy Spectrometer.
Measurement accuracy: 0.001%
Scope of application:
A. composition analysis of metal and nonmetal surface coating and plating layers
B. Composition analysis of surface stains
C. environmental corrosion simulation test of coating
C. environmental corrosion simulation test of coating
1. salt spray test: neutral salt spray, acid salt spray and copper ion accelerated salt spray test according to GM,FLTM,HES and NES standards can be carried out
2. Cyclic salt spray test
Standards: ASTM D6899-2003, SAE J2334-2002, GM4298P, GM4476P, GM9540P, ISO 11997-1: 2005, ISO 11997-2: 2002, WSK-M2G299