Our service

Centre Testing International Co., Ltd. (CTI) is the pioneer and leader in the TIC Industry which provides one-stop solutions on testing, inspection, certification, calibration, audit, training & technical services.

 

By Industry

Our service capabilties cover the upstream and downstream of the supply chain including textile and apparel,toys,electronic appliances,medical health,food...andother industries.

Specialty

Comprehensively guarantee quality and safety, promote compliance and innovation, demonstrate brand competitiveness, and achieve higher quality, healthier, safer, and greener sustainable development.

AUTHORITY & TRUST
QUALITY & VALUE
Coating Testing of Metal Materials

The product will inevitably be affected by the environment or other objects during transportation or use, resulting in partial functional failure of metal workpiece, such as oxidation, wear, corrosion, etc. Therefore, the quality of the coating layer has a vital influence on the surface performance of the product, and the quality of the coating can be effectively improved through the control of the coating quality. CTI China Testing can provide a series of tests for the coating of metal workpiece to help customers identify the quality of the coating and improve the service life of the product.

Coating Testing of Metal Materials

◉    Service Background

1. Want to know the quality of the product coating;

2. Want to improve coating technology and process;

3. Want to improve the surface performance of the product;

4. Want to extend the service life of the product.

◉    Service Content

1.   Routine test items

Coating thickness test

Coating thickness(metallographic method), coating thickness (XRF), coating thickness, anodized film thickness, anodized electrophoretic paint composite film, thickness of anodic oxide coatings for aluminium and its alloys(mass)

Coating weight test

Conversion coatings mass test, zinc Coatingaluminium-zinc coating mass test, seal quality of anodic oxide coatings for aluminium and its alloy

Adhesion test

adhesion test:Thermal shock, adhesion test:scribe-grid, adhesion test:bend

Coating related tests

Coating surface morphology, coating structure analysis, coating composition(surface), coating composition(cross section), coating composition(chemical methods), chromium coating crack, pore number, gold-plated layer porosity , the coating porosity

2.   Adaptive range of product

It is suitable for metal materials and their products, including steel, aluminum alloy, profiles, fasteners, auto parts, mechanical equipment and parts, etc.

3.   Routine sample requirements

Coating thickness(metallographic method), coating thickness, anodized film thickness, anodized electrophoretic paint composite film

Cut cross section

Coating thickness (XRF)

1. The height of the test sample shall not be greater than 13 cm, and the specific test position shall be specified, and the test plane of the sample shall be greater than 0.4 mm;

2. Need to provide sample plating process.

Thickness of anodic oxide coatings for aluminium and its alloys(mass)

1. Surface area 800~1000mm2

2. Mass ≤100g

Conversion coatings Mass test

1. The mass of the test piece ≤200g

2. Surface area requirements: mA unit film weight

 mA        1g/m2, S≥400cm2

                1~10g/m2, S≥400cm2

              10~25g/m2, S≥100cm2

              25~50g/m2, S≥50cm2

                 50g/m2, S≥25cm2

Zinc Coatingaluminium-zinc coating mass test

1. Suggestion: plate sample 60*60mm,3pcs

2. The single side area of plate is 3000~5000mm2

    Steel wire Ф (0.15-0.8)L=600mm

                          (0.8-1.5) L=500mm

                             (1.5) L=300mm

3. Others, total area2000m2

seal quality of anodic oxide coatings for aluminium and its alloy

Surface area≥5000mm2, about 10000mm2, 100*100mm is recommended

Adhesion test

1. scribe-grid: ≥100*100mm

2. bend: L≥200mm

Coating surface morphology, coating structure analysis, coating composition(surface), coating composition(cross section)

The surface does not contain moisture and has no magnetic sample

gold-plated layer porosity

The gold coating of the sample should be greater than 0.25μm

the coating porosity

Method 1: Nitric acid vapor method, suitable for gold plating, the thickness of the gold plating should be less than 0.75μm;

Method 2: Sulfur dioxide or sulfurous acid method, suitable for gold-plated layer, tin-plated layer, titanium-plated layer, palladium-nickel layer, the thickness of the plating layer should be greater than 0.38μm

coating composition(chemical methods)

20g, the sample surface is flat

4.   Our Advantages

1. We have experienced technical personnel to provide detailed technical consultation and result analysis;

2. We have advanced high-end and automation integrated detection equipment to provide a variety of detection programs;

3. We have complete testing and results reporting process to ensure accurate and reliable test results.

 

Related recommendations