Epoxy coated steel tanks, also known as fusion bonded epoxy (FBE) tanks, are crucial in various industries due to their durability and resistance to corrosion. Ensuring the quality of these tanks is essential for maintaining their reliability and longevity. With over 30 years of experience in tank research, production, and construction, Center Enamel has collaborated with global leading paint and coating manufacturer AkzoNobel to develop fusion bonded epoxy coating technology. This advanced anti-corrosion layer is known for its excellent corrosion resistance and adhesion properties. Additionally, the epoxy coating technology utilizes a special application process—electrostatic spraying technology—which enhances the coating's uniformity and adhesion, effectively extending the tank's service life.

Properties of Epoxy coated steel tank:

Various quality inspection methods for epoxy coated steel tanks:

Thickness Inspection of Epoxy Coating

Importance: The thickness of the epoxy coating is a critical factor that determines its ability to protect the steel tank from corrosion and other environmental factors.

Method: A coating thickness gauge is used to measure the thickness of the epoxy layer.

Process:

1. Clean the surface of the epoxy coating.

2. Place the gauge on the coating surface.

3. Take multiple measurements across different sections of the tank to ensure uniform thickness.

Frequency: This inspection should be performed for each batch of tanks to ensure consistency.

Color Consistency Inspection

Importance: Consistent color across all tanks is important for visual appeal and brand consistency.

Method: A colorimeter or standard color comparison charts are used to check color consistency.

Process:

1. Select multiple points on the tank surface for testing.

2. Use the colorimeter to measure the color at each point.

3. Compare the results to the standard color reference.

Frequency: Conduct this inspection for each batch of tanks.

Hardness Test

Importance: The hardness of the epoxy coating indicates its resistance to scratches and wear.

Method: A hardness tester is used to measure the coating's hardness.

Process:

1. Clean the test area.

2. Use the hardness tester according to the manufacturer's instructions.

3. Record the hardness values.

Frequency: Conduct this test periodically based on a set schedule.

Hot Water Immersion Test

Importance: This test evaluates the epoxy coating's resistance to hot water, which can indicate potential degradation under high-temperature conditions.

Method: Immerse the epoxy coated tank in 70°C hot water for a specified duration.

Process:

1. Prepare a hot water bath at 70°C.

2. Submerge the tank or a sample section for the specified time.

3. Inspect the coating for any changes in adhesion, hardness, or appearance.

Frequency: Conduct this test at specified intervals and durations.

Salt Spray Test

Importance: The salt spray test simulates marine environments to assess the tank's corrosion resistance.

Method: Use a salt spray chamber to expose the tank to a saline environment.

Process:

1. Place the tank or sample in the salt spray chamber.

2. Run the test for the specified time period.

3. Inspect the tank for signs of corrosion or coating degradation.

Frequency: Perform this test at specified times and intervals.

Chemical Resistance Test

Importance: This test determines the epoxy coating's stability and resistance to various chemicals.

Method: Expose the coated tank to different chemical agents.

Process:

1. Apply the chemical agents to the test areas on the tank.

2. Leave the chemicals in contact for the specified duration.

3. Inspect the coating for any changes or damage.

Frequency: Conduct this test for each batch and at regular intervals.

Abrasion Resistance Test

Importance: Abrasion resistance tests measure the coating's ability to withstand wear and tear, which is critical for tanks exposed to harsh environments.

Method: Use an abrasion testing machine.

Process:

1. Clean the test area on the coating.

2. Set up the abrasion tester according to the manufacturer's guidelines.

3. Run the test and record the results.

Frequency: Perform this test periodically.

Weather Resistance Test

Importance: The weather resistance test evaluates how well the epoxy coating performs under simulated natural weather conditions, such as UV exposure and temperature changes.

Method: Expose the tank to artificial weathering conditions.

Process:

1. Place the tank in a weathering test chamber.

2. Set the chamber to simulate specific weather conditions.

3. Run the test for the specified duration.

4. Inspect the coating for any signs of degradation or color change.

Frequency: Perform this test at specified times and intervals.

Quality inspection is vital for ensuring the performance and longevity of epoxy coated steel tanks (FBE) . By adhering to rigorous inspection methods, manufacturers can guarantee that their products meet the highest standards, providing reliable and durable solutions for their clients. Implementing comprehensive quality inspection protocols not only enhances product quality but also builds customer trust and satisfaction.