Solutions for Corrosion Problems on Cranes and Heavy Equipment

Solutions For Corrosion Problems in Cranes & Heavy Equipment

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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 – Djenkins@grappleHook.comPhones 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