Spherical Corrosion Test Cell, Double-Layer | ATOMFAIRProduct Type: Electrochemical cell
Research-grade laboratory product
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LABORATORY PROCUREMENT SUPPORT
For model selection, accessory matching, platform compatibility or configuration confirmation, contact our technical sales team.
E-MAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
This cell requires careful handling to maintain seal integrity and avoid contamination. It is incompatible with hydrofluoric acid and chloride contamination of the salt bridge must be prevented.
- Salt Bridge Contamination Avoidance: Avoid chloride contamination of the saturated KNO₃ salt bridge to prevent interference with corrosion measurements.
- HF Incompatibility: Do not use this cell with hydrofluoric acid as it will attack the glass and components.
- Gas Purging Protocol: During measurements, stop sub-surface purging and maintain only overhead purging to avoid disrupting the electrochemical interface.
- Seal and Leak Inspection: Verify seal integrity and inspect the water jacket for leaks before each use to prevent electrolyte loss or thermal instability.
- Sample Size Constraint: Use only samples of 15 mm diameter with a fixed exposed area of 1 cm² to ensure proper electrode contact and reproducible results.
Assemble the cell components and fill the salt bridge with saturated KNO₃ solution. Mount the sample, connect the electrodes, and establish gas purging and temperature control before measurements.
Required Equipment: Spherical corrosion test cell body, F-type gas inlet tube, Salt bridge assembly, Sample holder
- Assemble cell components
Assemble the cell body with the F-type gas inlet tube, salt bridge, liquid seal, and PTFE components. - Fill salt bridge
Fill the salt bridge with saturated potassium nitrate solution to avoid chloride ion interference. - Mount sample
Mount the 15 mm diameter sample into the sample holder ensuring a fixed exposed area of 1 cm². - Connect electrodes
Connect the reference electrode and graphite rod counter electrode to the cell. - Establish gas purging
Establish gas purging by connecting the F-type inlet to a gas source and adjust to overhead purging only during measurements. - Control temperature
Connect the water bath jacket to a thermostatic circulator to control the cell temperature. - Verify integrity
Verify seal integrity and inspect the water jacket for leaks before starting measurements.
How does the adjustable-angle Luggin capillary in the ATOMFAIR double-layer spherical corrosion test cell reduce uncompensated resistance (iR drop) during three-electrode measurements?
The adjustable-angle Luggin capillary allows precise positioning of the reference electrode directly toward the corrosion sample, minimizing the solution path length and thereby reducing uncompensated resistance (iR drop). The salt bridge is filled with saturated KNO₃ solution to avoid chloride ion interference, and the capillary angle can be fine-tuned to optimize reference electrode placement for accurate potential measurements.
What is the purpose of the saturated KNO₃ salt bridge in this corrosion test cell, and what are its compatibility limitations regarding corrosive environments?
The saturated KNO₃ salt bridge effectively avoids chloride ion interference in corrosion studies, ensuring accurate electrochemical measurements. However, the cell is not compatible with hydrofluoric acid (HF) environments. It is suitable for most other corrosive conditions, including elevated temperatures, as the high-borosilicate glass construction provides excellent chemical resistance and thermal stability.
What are the specific gas purging procedures for the F-type inlet during corrosion measurements, and why must sub-surface purging be stopped during measurements?
The F-type gas inlet supports both sub-surface (below liquid) and overhead purging for deaeration. During measurements, sub-surface purging must be stopped and only overhead purging maintained to prevent gas bubbles from disturbing the electrode surface or creating convection that would interfere with steady-state electrochemical readings. This procedure is critical for obtaining reproducible and artifact-free corrosion data.
This double-layer spherical corrosion test cell from ATOMFAIR features an adjustable-angle Luggin capillary to minimize iR drop and a thermostatic water jacket for precise temperature control, making it suitable for corrosion studies in most environments except HF.
Positive
- Adjustable Luggin capillary: The adjustable-angle salt bridge allows precise positioning of the reference electrode toward the sample, reducing uncompensated resistance (iR drop) for more accurate corrosion measurements.
- Integrated water bath jacket: The double-layer design includes a thermostatic water jacket for precise thermal regulation, enabling temperature-dependent corrosion studies and improved reproducibility.
Trade-offs
- HF incompatibility: The high-borosilicate glass and PTFE components are not resistant to hydrofluoric acid; this cell cannot be used in HF-containing corrosive environments.
- Chloride-free salt bridge requirement: The salt bridge must be filled with saturated KNO3 solution to avoid chloride ion interference; sub-surface gas purging must be stopped during measurements to prevent bubble interference.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
