Скачать или смотреть Corrosion Rate of Different Metals and Alloys | Shipwrecks and Salvage

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Electrolyte

Salt water (5% w/v)

Test materials

Metal strips: aluminium, iron, zinc, copper.
Alloy strips: stainless steel, brass

Procedure

1 Ensure that all metals and alloys are clean and free of corrosion
2 Place each metal or alloy flat in a Petri dish with the salt water so they are partially immersed.
3 Observe and record any changes to the surfaces of each material each lesson for several weeks.

Results and conclusion

From your observations, determine which metals or alloys may be best suited for use in vessels in a marine environment.

Reliability

Reliability can be improved by combining the results from all groups. It is important to keep the temperature as constant as possible and to prevent the saltwater from evaporating. This will require top-ups from time to time.