• 南宫NG28

    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.
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    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 Coating、aluminium-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 Coating、aluminium-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 area＞2000m2

    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.

     

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