The spherical corrosion test cell is a round-body glass cell for measuring the corrosion behaviour of metal samples with three-electrode methods. A 15 mm diameter sample mounts on the working electrode holder; the exposed area is 1 cm² (manufacturer data).
An adjustable-angle salt bridge (Luggin capillary) points the reference electrode at the sample and reduces the ohmic (iR) drop. To keep chloride ions away from the sample, the salt bridge is filled with saturated potassium nitrate (KNO₃). The F-type inlet bubbles gas through the solution before the measurement and only feeds gas over the surface during it.
The set consists of the cell body, F-type gas inlet, salt bridge, liquid seal, PTFE stoppers, sample holder, reference electrode and graphite rod counter electrode (manufacturer data). The cell can be used in corrosive media other than HF at room and elevated temperature.
The body is made of borosilicate glass 3.3, which has low thermal expansion (3.3 × 10⁻⁶ K⁻¹) and the highest resistance classes against water (HGB 1) and acids (S 1). Avoid sudden temperature differences above 120 °C to reduce the risk of breakage.
In the jacketed (double-layer) version an outer water jacket surrounds the inner cell. Water from a circulating thermostatic bath flows through the jacket via hose connections and keeps the electrolyte at a constant temperature during the measurement.
| Cell type | Spherical corrosion cell, standard-sealed |
| Temperature control | Water jacket for a circulating thermostatic bath |
| Body | Borosilicate glass 3.3 |
| Sample | Ø15 mm, exposed area 1 cm² |
| Set contents | Body, F-type inlet, salt bridge, liquid seal, PTFE stoppers, sample holder, reference electrode, graphite rod |
| Operating media | Corrosive media except HF; room and elevated temperature |
| Volume options | 500 mL, 1000 mL |
For volumes, dimensions or port layouts other than those listed, you can request a custom-made quotation through the Quotation Form.
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