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Electrochemical corrosion protection

Electrochemical corrosion protection

VC1.5.3.3

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Description

In experiment C1.5.3.3, the cathodic protection anode technique is used to prevent electrochemical corrosion. The method is based on the fact that the speed of electrochemical corrosion processes depends on the electrode potential. If that electrode potential is shifted externally, the corrosion can be inhibited or greatly restricted. In the experiment, a zinc electrode is used as a cathodic protection anode. The metal to be protected is conductively connected to a less noble metal; a corrosion element is formed in which the less noble metal (the cathodic protection anode) dissolves while the nobler metal remains protected.

Components of equipment sets

1	6644071 8	Electrochemistry demonstration unit, CPS
1	301339 8	Stand bases, pair
1	664401 4	Electrochemistry accessories set
1	ADAHCB602H	Precision Balance, 600 g /0,01g, with USB interface
1	665795 4	Volumetric flask, Boro 3.3, 500 ml
1	665793 4	Volumetric flask, Boro 3.3, 100 ml
1	665953 8	Dropping pipette 150 mm x 7 mm Ø, 10 pieces
1	665954 4	Dropper bulb, 10 pieces
1	665008 4	Funnel, PP, 50 mm diam.
1	666967 8	Spoon-ended spatula, stainless steel, 150 mm
1	6735700 4	Sodium chloride, 250 g
1	6726100 4	Potassium ferrocyanide (III), 50 g EUH032
1	6742500 4	Phenolphthalein solution, 100 ml Danger H225 H319
1	6731000 4	Magnesium, ribbon, 25 g Warning H228

Experiment Instructions

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C1.5.3.3 Electrochemical corrosion protection

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Electrochemical corrosion protection

Description

Components of equipment sets

Experiment Instructions

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