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Tech Tour Seminar Series Scott de Recat – Derema Group

Tech Tour Seminar Series Scott de Recat – Derema Group. Corrosion 101. What is Galvanic Corrosion?. When a metal is immersed in an electrolyte (salt, brackish, or fresh water) small electrical cells begin to form on the metal’s surface as a result of a chemical reaction.

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Tech Tour Seminar Series Scott de Recat – Derema Group

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  1. Tech Tour Seminar SeriesScott de Recat – Derema Group

  2. Corrosion 101 What is Galvanic Corrosion? When a metal is immersed in an electrolyte (salt, brackish, or fresh water) small electrical cells begin to form on the metal’s surface as a result of a chemical reaction. In time, the metal becomes polarized and material is lost from the anodic pole of these cells. This causes the damage we know as galvanic corrosion. An even stronger effect is produced when two different metals are electrically connected in the same electrolyte.

  3. Corrosion 101 The Noble Scale ANODIC METALS (MOST ACTIVE, LEAST NOBLE) M III - Mg (-1450 mV) M II - Al M I - Zn Galvanized Steel Aluminum Mild Steel Iron Tin Bronze Brass Nickel Copper Stainless Steel Silver Gold (+1420mV) THE MORE SPACE YOU HAVE BETWEEN METALS, THE MORE ELECTRICAL CURRENT IS DERIVED CATHODIC (LEAST ACTIVE, MORE NOBLE)

  4. Corrosion 101 Martyr Anode Alloy Breakdown

  5. Corrosion 101 3 Different Anodes for 3 Different Water Environments There used to be only 1 anode type – Zinc. But over many years OEM’s, boat builders and the general boating public realized that there were too many variables when it comes to key boating areas and proper protection and thus the evolution of 3 different anode alloys.

  6. Corrosion 101 3 Different Anodes for 3 Different Water Environments • Salt Water Only! • Does not work in fresh & brackish water • Very Heavy and Shiny • Looks “sandblasted” as it corrodes. • Readily Available. Zn Al • Salt & Brackish Water • Does not work effectively in pure fresh water • Very Light, Dull Silver in Color • “Pits” as it corrodes. • Available in Commercial & Pleasurecraft lines • Used by most OEM’s Mg • Fresh Water Only! • Cannot be used in salt or brackish water • Extremely light. Dark Grey in Color • Available in Pleasurecraft only

  7. Corrosion 101 Recent News - Anodes & The Environment

  8. Corrosion 101 Recent News - Anodes & The Environment WA DOE Boatyard General Permit Guidelines – Page 14

  9. Corrosion 101 So now what are your options? • Aluminum Anodes - Benefits • Contain No Cadmium. Primary elements are Aluminum and Indium which are non-toxic • Better efficiency and performance vs. Zinc • Improved corrosion protection • Reducing the quantity of anodes required • Longer performance life • Lighter in weight then Zinc anodes • Less costly than Zinc anodes • Martyr Brands them as “Cadmium-Free” MII Anodes • Other companies offering Aluminum Anodes include • Performance Metals, Sea Shield and Reliance

  10. Corrosion 101 Who’s using Aluminum Anodes • US Navy • Canadian Navy • US and Canadian Ferry Fleet • Oil and Gas Industry – Offshore drilling platforms • Leading dock manufactures world wide • All US/Japanese engine manufacturers • Mercury • Volvo • BRP • Honda • Yamaha

  11. Corrosion 101 What has been written about Aluminum vs. Zinc? • Seaworthy/ Boat US Standards: • “Below the waterline, when you have a stainless steel shaft and a bronze prop, which can’t be isolated, you’ll need an anode — either zinc, magnesium or aluminum — that will be sacrificed to save the fitting. Zinc can be used in saltwater; magnesium can be used in freshwater (never in salt or brackish water); but the most widely affective anodes these days are being made of aluminum, which can last up to 50% longer, and remain active in brackish and saltwater. How, you may ask, does an aluminum anode protect an aluminum outdrive? The answer is that an anode is made with an aluminum alloy that is significantly different (more anodic) than the alloy used on an outdrive.”

  12. Corrosion 101 What has been written about Aluminum vs. Zinc? • West Advisor: Getting rid of Cadmium and Zinc • “Zinc and cadmium are elements used in traditional salt-water anodes that are suspected of causing environmental damage. CMP Global has re-formulated their product, removing these alloys for safer more “green” anodes. A rare bit of good news for the boater: these new formulations actually work better! They’re lighter and last longer, so they’re a plus for your boat and for the underwater life in your marina”.

  13. Corrosion 101 What has been written about Aluminum vs. Zinc? Marine Log – April 2012 Issue Crowley Marine – VP of Engineering – Bill Metcalf Crowley’s vice president, Engineering, and a 30-year Crowley veteran, Bill Metcalf says the company has used aluminum anodes “since before I joined the company”. The reason? “it’s based on utilization. The aluminum anodes will last longer in the water, they have a better performance life, say Metcalf”.

  14. Corrosion 101 What has been written about Aluminum vs. Zinc? Artist, Sport Fishing Professional, Environmentalist, Editor Guy Harvey – Summer 2012 Guy Harvey Magazine

  15. Corrosion 101 FAQ’s about Aluminum vs. Zinc? • Can I use aluminum anodes on my aluminum boat? • Why doesn't Martyr produce aluminum pencil anodes? • Can I mix aluminum anodes with zinc anodes?

  16. Corrosion 101 What to look for in Anode Protection • Quality • MIL Spec Products are critical – Reliable Performance. • Products produced in an ISO 9001 Certified Facility • In-house lab testing ensures adherence to the Mil Spec alloy material (zinc, aluminum & magnesium) • Approved vendor to many OEM, Government & Military organizations around the world • Product Availability - Bulk & Packaged Anodes • Product availability in all 3 alloys (only manufacturer to do so) • Products available for most popular marine engines/ systems • Key boatyard products including commercial plates • 2 choices of shaft/ rudder/ collar hardware – hex & slotted in stainless • Over 50 new products launched every year (over 400+ parts now!)

  17. Corrosion 101 What does Martyr have to offer? • Customer Service/ Support • Factory & Rep support in the field • Factory personnel trained in Corrosion Control through NACE • Worldwide distribution network • Fisheries Supply • Diversified Marine Products • Redden Marine • Port Supply • Large range of support material available

  18. Catalogs Posters/ Flyers Website POP Items www.martyranodes.com Corrosion 101 Did we mention support… Website Website Website www.martyranodes.com www.martyranodes.com www.martyranodes.com

  19. Corrosion 101 Did we mention support… Custom FAB’s Sell Sheet Available Just ask!

  20. Corrosion 101 QUESTIONS?

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