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A Primer on Abrasive Blasting for the Custom Coater
What you should know about Abrasive Blasting and Profiles, and more!
Chris McKinnonAegis Industrial Finishing Ltd.
May 2-3, 2016
What’s in it for me?
• Thank you to PCI for allowing me to participate in this event.
• Aegis Industrial Finishing started in 2009
• Family business with history of metal finishing going back to 1948.
• Opportunity to become leaders in our market with emphasis on service, quality, and education.
• Fulfill my objective to share what I’ve come to learn and hopefully help you in your business in some small way.
What’s in it for you?
• Understanding and appreciation of the benefits of abrasive blasting
• Working knowledge of the equipment required to do it right
• Safety considerations
• How to ensure quality
• Coating performance gains
• Step in the right direction to see if it is right for you
Where are we going today?
• How to talk to the talk (Standards and Associations)
• Is it a good fit for your business?
• Safe Production with Abrasive Blasting
• Equipment required to do the job (startup equipment, PPE, quality tools)
• Types of blast media and specific application equipment
• Demonstrated and repeatable quality
• Learn from my failures and observations
• 10 Minutes at end for Q&A
Talk the talk
• Associations• NACE (National Association of Corrosion Engineers)• SSPC (Society for Protective Coatings)• Sa (Swedish Standard)
• Key terms• Deadman• Media• T-Valve• Blast Profile (Peaks and Valleys)• Mesh• Adhesion• Mill Scale• Hot Rolled / Cold Rolled• Peen vs. Cut
Is abrasive blasting a good fit for your facility?
Some questions to consider:• What does our market require?
• Do I have the space, power, and air volume?
• How much am I willing to invest?
• What size parts do we handle?
• Who will my competition become?
• Do we have the technical expertise to be successful?
• Do we want to grow our business into a new market?
Is abrasive blasting a good fit for your facility?
Some other options you may consider:
• Can I partner with a blasting shop to handle the work?• Does this limit me from securing the type of business I want to pursue?
• Quality is critical, but some customers don’t require a white metal blast every time.
• Will a small blast cabinet meet my needs or do I need to invest in a proper blast booth?
Safe Production
• PPE Required• N95 paper mask at a minimum• Helmet• Gloves• Coveralls
• Proper breathing air• Silicosis
• Training of your operator
• Preventative Maintenance
Equipment Required to do the job• Compressor• Filters• Blast Room
• Clean, dry, and contained• Material Handling equipment
• Overhead crane• Forklift• Carts
• Safety Equipment• Helmet• Gloves• Coveralls• Steeltoed Footwear• Dust masks (for reclaim / moving parts in and
out)
• Dust collector• Media Reclaim• Disposal method
• Dust• Galvanized media and zinc content
Blasting Media
• Not sand, never ever sand
• Starblast (staurolite) – great multipurpose blast media, uniform shape and size, peens instead of cut.
• Walnut Shells – great for removing paint
• Aluminum Oxide – aggressive media, high cost, angular
• Steel shot – hard, good for steel, peens
• Copper slag
• Steel slag – cuts
• Garnet – readily available, 2 – 3 turns, cuts.
Repeatable Performance
• Salt Spray Testing
• Adhesion Testing
Quality Tools
o Needle gauge – test velocity of air speed in your blast hose
o SPG – Surface Profile Gauge
o Pull off adhesion tester – Verification tool for coating bond strength
o Tape test w/ Anvil Micrometer – Measure blast profile like it’s 1979
o VIS-1 Visual Standard Guide – NACE/SSPC certified visual guide for degrees of
blast cleanliness
o Sand paper – knock down blast profile when doing single coat
Substrates
• Aluminum
• Steel
• Stainless Steel
• Galvanizied Steel
Learn from my mistakes….
• Grease
• Light gauge material (oil canning)
• Welds
• Shadows
• Adhesives
• Multi Metal Blasting
• Material Handling
• Pressure differential / blockages / couplers etc
Learn from my mistakes….
• Brush blast on mill scale
• Bar stock with tears in it
Questions?
If you are too shy to raise your hand please feel free to talk to me afterwards or contact me at chris@aegisfinishing.com
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