1. What is really needed... Corrosion Protection Presented by:
Rick Wuebbeling
February 1, 2008

2. Agenda Common wires Alternate Wires Price comparisons
Characteristics
Strengths / weaknesses
Alternate Wires
Possible applications
Price comparisons
Salt Spray Analysis

3. Corrosion
Corrosion is the gradual alteration, degradation, or eating away of a metal due to a chemical ore electrochemical reaction between it and its environment.

4. Common Wires Carbon Steels
Plain uncoated carbon steel
Strength -- $$$ lowest price
Strength – Fatigue
Weakness – very little corrosion protection
Galvanized coated carbon steel
Strength – Appearance
Weakness – Possible flaking or peeling of coating
Weaknesses -- Bimetallic corrosion with Copper or Brass

5. Common Wires Stainless Steels
Stainless Steel 430 (current surcharge $.37/lb)
Strength – Cheapest SS (low nickel content)
Weakness – marginal improvement of corrosion protection over Galvanized wire
Weaknesses – lower ductility than SS304
Stainless Steel 302/304 (current surcharge $1.29/lb)
Strength – very ductile, surface appearance
Strength – high temperature applications
Strength – readily available
Weakness – Cost
Stainless Steel 316 (current surcharge $2.37/lb)
Strength – Corrosion Protection
Weakness – Cost(Nickel and Molybdenum) and Availability

6. Common Wires “Red Metals”
Phosphur Bronze
Strengths – Fatigue
Weaknesses -- Price
Brass Wire
Strength– Electrical Conductivity
Weaknesses – Corrosion and wear restistance
Nickel Silver
Strength – Formability, ductility

7. Other Materials Zinc Aluminum Coated Carbon Steels (95%Zn / 5%Al)
Strengths – 3 to 6 times more corrosion protection than Galvanized
Strengths – Price when compared to Stainless
Weaknesses – Appearance, dull color
Weaknesses -- Bimetallic corrosion with Copper and Brass
Weakness -- Poor corrosion in strong Alkali conditions
Weaknesses – Ductility compared to Stainless

8. Other Materials Plastic Coated Zinc Plated Carbon Wires
Strength – Corrosion protection
Strength – Cost compared to Stainless
Strength -- Color
Weaknesses—Ductility compared to annealed Stainless
Weaknesses—Abrasive resistance

9. Other Materials Stainless Steel 204CU
Strengths – cost compared to SS302(low Nickel Content)
Strengths – Corrosion similar to SS302 in most applications
Weaknesses – Higher annealled Tensile, but still good workability due to Copper additive
Weaknesses -- Availability
Weakness – Slightly inferior finish quality??

10. Other Materials
SAF 2205 – Duplex Stainless Steel (Austenitic-Ferritic)
Strengths – High Fatigue and Strength especially compared to Stainless 302 or 316
Strengths – Better Corrosion protection than SS316
Strengths – Magnetic
Weaknesses – Price when compared to Stainless. However, compared to Nickel coated Oil Tempered Carbon, much cheaper.
Product
PRE Score =
Cr%+Mo%+N%
SAF2205 35
SS316 24
SS302 18
PRE determines the performance
In a chloride containing environment

11. Corrosion Protection
Galvanized wire has a life span of about 2 years in a normal atmosphere.
Or 6 months along an ocean coastline.

12. Pricing
Galvanized coated wire is used as the standard.

13. Summary
With rising material costs, foreign competition, we all should consider alternate materials in order to stay competitive.
Many times products have been over engineered, due to the fact the material costs were similar some years ago, however as certain material cost sky rocket, we need to reconsider…

14. Questions -- Comments