Sangari
All products

CH561 · Corrosion Studies

Experimental apparatus for the study of materials corrosion

Experiments
  • Corrosion behaviour of different metals, interpreted through the electrode-potential series
  • Galvanic corrosion of dissimilar-metal couples (steel/copper, steel/zinc)
  • Influence of pH on the corrosion rate - tests at pH 4, 7 and 9
  • Influence of chloride (NaCl) concentration in the electrolyte
  • Oxygen corrosion - oxygenated versus deoxygenated (nitrogen-purged) media
  • Electrochemical corrosion driven by an applied voltage between metals
  • Cathodic protection by impressed current and by sacrificial anodes
  • Effectiveness of corrosion inhibitors (phosphates, silicates) on steel passivation
  • Stress corrosion - the influence of internal mechanical strain
  • Passivation of aluminium and stainless steel
CH561
Description
    Corrosion is fundamentally an electrochemical process: in contact with an electrolyte, a metal forms anodic regions where it dissolves and cathodic regions where the released electrons are consumed. CH561 makes every factor that drives this anode-cathode cell - the metal, the pH, the salt content, dissolved oxygen, an applied voltage, stress or an inhibitor - visible and measurable. The corrosion rate is read both by direct observation and by weighing the specimens after a known exposure period.
CH561 - front view with the main components labelled
DC power-supply sockets
Control unit
Flow-regulating valve
Cell lid (specimen holder)
Borosilicate glass cell
Metal specimens
CH561 - front view with the main components labelled
Specifications
    Corrosion cells 8 × borosilicate glass, ≈700 mL working volume, machined lids for specimen mounting
    Specimens 3 identical per cell - steel, zinc, brass, copper, aluminium
    Inert electrodes platinum
    pH measurement Adwa AD12 waterproof pH / temperature tester with microsensor
    pH range / resolution 0.00-14.00 pH / 0.01 pH
    Temperature range 0-60 °C
    Aeration integrated diaphragm pump feeding a common manifold, with a flow-regulating valve at each cell
    Agitation gas clean compressed air, or inert nitrogen (external cylinder) for deoxygenated tests
    Electrical supply 12 V DC (SELV), via external certified adapter (MEAN WELL GST80A12)
    Electrochemical tests low-voltage DC applied across specimen pairs for impressed-current and cathodic-protection studies