Name__________________________                                                           Class_______

Corrosion in Bridges PowerPoint

Guided Notes

Introduction

One example of a bridge in Manhattan is ______________________________.

What kind of furnace turns iron into steel?_____________________________ This is accomplished by adding _________________________.

Two lengths of steel wire can hold _________________________ton(s) without breaking.

Define:

                     Anchorage:

        Prefabrication:

Corrosion

Iron oxide is a fancy word for _________________.

Some  Common Ways to prevent corrosion:

            1. protective coatings

                        examples: _______________________ and  ________________________

            2. corrosion resistant materials

                        example:  stainless steel

(an alloy of steel and ____________________ so it is very       _    

     __________________!)

            3. anodic/cathodic protection

when you attatch a more _____________________ metal near the metal you don’t want to corrode. Then run some electric current through it!

                Define:

                        Anode:

                        Cathode:

Rust forms at the ______________________ region. The metal that is      

   protected is found at the ___________________ region.

Draw a picture of  an anode/cathode cell:

The ________________________ region turns pink in phenolphthalein indicator (it is basic, like bleach.)

***Answer the “What do you think?” question….

The percentage of steel used for repair of corrosion is ____________________%.