ASTM C633 Test Adhesion or Cohesion Strength of Thermal Spray Coatings
ASTM C633 is a standard test method used to evaluate the adhesion or cohesion strength of thermal spray coatings. By following a standardized procedure, this testing method ensures accurate and reliable results. In this blog post, we will provide you with a step-by-step guide on how to perform ASTM C633 testing effectively.
Step 1: Understand the Purpose and Scope
- Before beginning the testing process, it is crucial to familiarize yourself with the purpose and scope of ASTM C633. This standard aims to determine the bond strength between a thermal spray coating material and its substrate.
Step 2: Gather Materials and Equipment
- To conduct ASTM C633 testing, gather the necessary materials and equipment:
- Test specimens: Coating and substrate samples prepared according to the standard’s requirements.
- Test machine: A suitable testing machine capable of applying tensile or shear force.
- Gripping fixtures: Appropriate fixtures to securely hold the test specimens during the test.
- Force measurement device: A reliable means of measuring the applied force during testing.
Step 3: Prepare Test Specimens
- Prepare the test specimens according to the specified dimensions and surface preparation methods outlined in ASTM C633. Ensure that the coating and substrate surfaces are clean, free from contaminants, and properly prepared.
Step 4: Mount the Test Specimens
- Using the gripping fixtures, securely mount the test specimens to the testing machine. Follow the instructions provided by the machine manufacturer and ensure proper alignment and contact between the coating and substrate.
Step 5: Apply Force
- Apply the force to the test specimens in accordance with the test type specified in ASTM C633. The standard provides options such as tensile bond strength, shear bond strength, and four-point bend tests. Follow the recommended force application rate specified in the standard to ensure consistent and accurate results.
Step 6: Record Data and Failure Modes
- As the test is conducted, record the data accurately. This includes measuring the force required to produce failure, documenting the type of failure observed (adhesive, cohesive, or interfacial), and any additional observations or notes.
Step 7: Analyze and Interpret Results
- After completing the test, analyze the obtained results based on the requirements outlined in ASTM C633. Compare the bond strength values to the specified acceptance criteria to evaluate the coating’s performance.
Step 8: Report Findings
- Prepare a comprehensive report that includes all relevant information regarding the test procedure, specimen preparation, test conditions, and results. Ensure the report follows the guidelines outlined in ASTM C633 and provides clear and concise information.
Step 9: Ensure Safety Precautions
- Throughout the entire testing process, prioritize safety. Adhere to laboratory safety guidelines, wear appropriate personal protective equipment, and handle equipment with caution.
Step 10: Continual Learning and Improvement
- ASTM C633 testing requires a combination of theoretical knowledge and practical experience. Continually seek to expand your understanding of the standard, stay updated on any revisions, and engage in further training to enhance your expertise.
Frank Bacon Machines for C633 Testing:
Please contact Frank Bacon Machinery Sales for your ASTM C633 testing and testing set up.