Features
Principles of corrosion and corrosion protection on metallic materials
Oxygen corrosion
Electrochemical corrosion (local elements)
Corrosion protection with external voltage and sacrificial anodes

Corrosion damage to metallic components causes considerable economic and technical damages. The issue of corrosion and corrosion protection therefore plays an important role in technical training.
Corrosion Experimental Unit 32380 allows a variety of factors that influence corrosion processes to be investigated in parallel. Eight glass vessels are available to do this. They allow different materials to be compared under different conditions. The required electrolyte solution is added to the vessels. Up to six specimens can be attached to the cover of each vessel and these are immersed in the solution.
It is possible to connect specimens to an electrical conductor to investigate local elements and the principle of sacrificial anodes. An adjustable power pack allows an external voltage to be connected.
This counters the current flow between precious and base metals in local elements. As result the corrosion rate of the more base metal is reduced.
A diaphragm pump conveys ambient air into the electrolyte solution as required. Flow control valves can be used to individually adjust the gas flow rate for each vessel. It is also possible to feed other gases provided by the laboratory into the electrolyte solution. A pH meter is included to allow the influence of the electrolyte solution on corrosion processes to be investigated and compared.

Specifications
Investigation of corrosion and corrosion protection measures Ÿ 8 electrolyte vessels with covers and 6 specimen holders each Ÿ Adjustable power pack for application of external voltage
Air supply via diaphragm pump
Reversing valve for air or external gas supply
Adjustment of gas flow rate for each vessel using flow control valves
Recording of pH value of electrolyte solutions using manual unit
Pressure range for external gas supply: 0,2…1,0bar

Technical Specifications
Electrolyte vessels
Capacity: 1000mL
Material: glass
Power pack
Voltage: 0…30VDC
Current: 0…5A
Diaphragm pump: approx. 260L/h
Specimens
6x stainless steel, steel, copper, brass, aluminum
3x glass
Dimensions: 100x15x1mm
Measuring ranges
pH value: 0…14
Resolution: 0,01

Experiments
Corrosion behavior of different metallic materials (rust / passivation)
Formation of local elements
Influence of pH value of the electrolyte solution
Influence of salt concentration in the electrolyte solution
Oxygen corrosion
Corrosion protection
External voltage
Sacrificial anodes
Protective layers

Requirements
Mains Power 220 – 240V @ 50Hz, 1Ph