Mechanical Finishing Q&A: Blasting Steel Parts to Clean and Profile for Coating Adhesion Specifications
How do we achieve these coating adhesion specifications and automate our process?
Q. We are a machining manufacturer and have an upcoming hot rolled welded steel pipe part. The print calls out an SSPC-SP5, 3 Mill profile, with adhesion testing, but we are not familiar with these specifications. How do we achieve these specifications and automate the process?
A. The Society for Protective Coatings (SSPC) and mill profile specifications are standard for surface preparation for paint and coating adhesion. Many coating manufacturers have the specification recommendations in the preparation instructions for each product. Wheel or air blasting the surface with various blast media will clean and profile to achieve both specifications. One blast process will accomplish both at the same time.
Blast equipment automation recommendations are hard to make without seeing the part or knowing the production rates. Media selection would also help determine what systems to recommend. Wheel or air automated blast systems could include J-belt or basket tumble blast, in-line conveyors, rotary tables or spinner hangers.