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Crane Rust and Cause Safety and Maintenance Issues. Harsh environments such as Saltwater, Fertilizer, Chlorine and Sulfuric Acid not only eat the crane, but eat the maintenance budget. This presentation can also be seen on YouTube, It covers both electrical and structural steel.
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Solutions For Corrosion Problems in Cranes & Heavy Equipment
Produced By
What Are We Going To Cover Today?
1) Definition of Corrosion
2) Types of Corrosion
3 ) Types of Metals
4) Corrosion Treatment Processes a) determine actual problem b) determine products required c) remove existing corrosion d) inspect metal surfaces for major defects e) apply corrosion preventative compounds
5) Role Of Inspectors
Audience Participation & Presenters
Dan Jenkins
Audience Participation & Presenters
Contact Us Before During And After
In Webinar BoxEmail – [email protected] 813-877-4665 -
Ron Knight
Bolts and Fasteners
Where Does Corrosion Occur?
Boom Sections
Where Does Corrosion Occur?
Under Carriage
Where Does Corrosion Occur?
Electronics
Where Does Corrosion Occur?
Corrosion…. A Lot More Than Cosmetic
Factors Include:
Maintenance Labor Costs
Equipment Replacement Costs
Critical Down Time
Worker Safety
Where is Corrosion Happening?
Definition of Corrosion
The return of metals to their normal oxide state
Types of Corrosion●Uniform●Localized●Galvanic●Environmental Cracking●Flow Assisted●Intergranular●De-Alloying●Fretting●High Temperature
Uniform Corrosion
•Most common type of corrosion•Caused by chemical or electro chemical reaction•Destroys most metal•Slow moving•Easy to monitor•Correctable in PM
Localized Corrosion
•Corrosion targets one area of metal structure•Extremely dangerous•Three basic types
Pitting
Crevice
Filiform
Environmental Cracking•Extremely dangerous
•Stress Corrosion Cracking
•Hydrogen-induced cracking
•Corrosion fatigue
•Caused by reaction of metal to environment
Chemical-including gases
Temperature
Moisture
Fretting Corrosion
•Caused by un-lubricated movement•Hard to detect•Occurs by vibration/rubbing of parts•Causes pitting and galling
Leads to stress raisers and tensile failures
Corrosion Pit-Tensile Failure
Fatigue Fracture
Effects of Corrosion on Types of Metals
•Different base metals react differently•Iron and steel-iron oxides-usually red/orange•Aluminum-aluminum oxide-white powder
Effects of Corrosion on Types of Metals
Effects of Corrosion on Types of Metals
•Copper – oxides–Cuprous-red or yellow
–Cupric sulfate-pale green or white powder
–Copper acetate-blue
More About Moisture / Water
1.Ron Knight To Explain
More About Acid Vapors
1.Ron Knight To Explain
More Salts & Chlorides
1.Ron Knight To Explain
Types of Metals Found on Heavy Equipment
1. Iron
2.Steel3.4.Various
Elements
Types of Bolts, Fasteners and Hardware Found on Heavy Equipment
Low or Medium Carbon Steel
Medium Carbon Steel, Quenched and Tempered
Medium Carbon Alloy Steel, Quenched and Tempered
Stainless Steel
Other
1.R
Summary About Conditions
Know Your Environment
Pay Attention To Inspection Reports
Questions
Preventing Corrosion
Better Than Any Cure!Better Than Any Cure!
Corrosion Prevention
Selecting Corrosion Prevention Compounds
Goals / Factors / Issues
Water Displacement
Specific Gravity
Corrosion Prevention
Selecting Corrosion Prevention Compounds
Length of Time It Lasts
Type of Lubrication
Resistance to Water
Corrosion Prevention
Explanation of Nanotechnology And
Why Should You Think About It?
Corrosion Prevention
Applying Corrosion Prevention Compounds
Dip Process
Great for Fasteners
Corrosion Prevention
Corrosion Prevention Compounds
Brushing Technique
Corrosion Prevention
Selecting Corrosion Prevention Compounds
Spray Techniques
Questions
Let’s Talk Exterior Corrosion
Problems With Re Painting – Or, Sandblasting & Repainting
Let’s Talk Exterior Corrosion
Problems With Re Painting – Or, Sandblasting & Repainting
The Key Is Understanding Free Iron Oxides
Let’s Talk Exterior Corrosion
Problems With Re Painting – Or, Sandblasting & Repainting
Who Has Seen Rust Underneath Paint
49
Corrosion Conversion
Process
Rusted Scraped Converted
Corrosion Removal
RK
51
Corrosion Conversion
Progression
52
Old School New School
Corrosion ConversionPaint Over No Rust
Prep and PaintOver Rust
Corrosion Converters Considerations
1. How Much Acid Does Product Contain?2.3. How Much Time is Involved in
Preparation?4.5. How Many Steps Are There In
Preparation?6.7. What is The Dry Time?8.9. What is The Cure Time?10.11. How Soon Can One Begin To Paint?
Questions
Conclusion
Small Problems Turn Into Big Problems
Time Is Money – Consider Labor Costs
Protect Your People & Assets
Ounce of Prevention is WorthA Pound of Cure
Thank You!
References
Liberty Crane ServiceCrane TechNational Crane ServicesCertified Boom Repair
