Table of Contents

  • Section 5: Electrodes
    • 5.1 Electrode Handling Precautions
    • 5.2 Shafts
    • 5.3 RDE Tips
    • 5.4 Single-Piece RDE Designs
    • 5.5 RRDE Tips
    • 5.6 RCE Tips

5.1 Precautions

Rotating electrode tips and shafts are precision research tools machined to tight specifications for proper balance when spinning at high rotation rates. When not in use, an electrode tip should be cleaned, dried, and stored in its original case. When working with electrode shafts and tips, special care should be taken not to drop the shaft or tip as this will likely throw the shaft or tip off balance.

icon_caution.jpg

WARNING:

Do not use or attempt to rotate an electrode shaft that has been dropped, bent or otherwise physically damaged.
Inspect the shaft to be certain that it is not damaged.

AVERTISSEMENT:

N’utilisez pas et ne tentez pas de mettre en rotation un arbre d’électrode qui est tombé, a été tordu ou a été endommagé physiquement d’une autre manière ou d’une autre.
Inspectez l’arbre pour vous assurer qu’il n’a pas été endommagé.

 

icon_caution.jpg

WARNING:

Do not use or attempt to rotate an electrode tip that has been dropped or otherwise physically damaged.
Inspect the electrode tip to be certain that it is not damaged.

AVERTISSEMENT:

N’utilisez pas et ne tentez pas de mettre en rotation un embout d’électrode qui est tombée ou a été endommagée physiquement d’une autre manière ou d’une autre.
Inspectez l’embout d’électrode pour vous assurer qu’elle n’a pas été endommagée.

 

icon_caution.jpg

WARNING:

Do not use an electrode shaft which appears to wobble, vibrate, or tilt away from the axis of rotation while rotating. Such a shaft is either improperly installed or physically damaged. Turn off the rotator, disconnect electrical power, and remove the shaft immediately.

AVERTISSEMENT:

N’utilisez pas un arbre d’électrode qui semble osciller, vibrer ou dévier de l’axe de rotation pendant la rotation. Cet arbre est soit installé de manière incorrecte soit endommagé physiquement. Éteignez le rotateur, déconnectez l’alimentation électrique et retirez l’arbre immédiatement.

 

icon_caution.jpg

WARNING:

Do not use an electrode tip which appears to wobble, vibrate, or tilt away from the axis of rotation while rotating. Such an electrode tip is either improperly installed or physically damaged. Turn off the rotator, disconnect electrical power, and remove the electrode tip immediately.

AVERTISSEMENT:

N’utilisez pas un embout d’électrode qui semble osciller, vibrer ou dévier de l’axe de rotation pendant la rotation. Cet embout d’électrode est soit installée de manière incorrecte soit endommagée physiquement. Éteignez le rotateur, déconnectez l’alimentation électrique et retirez l’embout d’électrode immédiatement.

 

icon_caution.jpg

CAUTION:

Do not exceed the maximum rotation rate for an electrode.
Each type of rotating electrode has a specific maximum rotation rate limitation. Consult the documentation for the specific electrode being used in order to learn the maximum rotation rate for that electrode.

ATTENTION:

Ne dépassez pas la vitesse de rotation maximum pour une électrode.
Chaque type d’électrode rotative possède une vitesse de rotation maximum spécifique.
Consultez la documentation pour l’électrode spécifique à utiliser pour connaître la vitesse de rotation maximum de l’électrode.

 

icon_caution.jpg

CAUTION:

Do not apply excessive twisting force to the shroud of an electrode tip when threading it on to the shaft, as this may cause a leak between the shroud and the electrode.

ATTENTION:

N’appliquez pas une force de torsion excessive à l’enveloppe de protection d’un embout d’électrode lorsque vous la vissez sur l’arbre, car cela pourrait provoquer une fuite entre l’enveloppe de protection et l’électrode.

 

icon_caution.jpg

CAUTION:

Position the motor unit with respect to the glass cell so that the electrode tip is immersed approximately  \textbf{1.0 cm} into the test solution.
Excessive immersion may corrode the shaft or tip by allowing liquids to seep into the joint between the shaft and tip.

ATTENTION:

Positionnez le bloc moteur en fonction de la position de la cellule de verre, de telle sorte que l’embout d’électrode soit immergée sur environ 1 cm dans la solution d’essai.
Une immersion excessive peut entraîner la corrosion de l’arbre ou d’embout d’électrode en provoquant l’infiltration de liquides dans le joint situé entre l’arbre et l’embout d’électrode.

 

icon_caution.jpg

CAUTION:

Center the rotating electrode within the opening on the cell so that it does not rub against the walls of the opening.
Damage will occur if the rotating shaft or tip abrades against these walls.

ATTENTION:

Centrez l’électrode rotative dans l’ouverture de la cellule pour qu’elle ne frotte pas les bords de l’ouverture.
Le frottement des bords de la cellule par l’arbre ou par l’embout d’électrode entraînera des dommages.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

Electrode tips with PTFE shrouds are designed for use at room temperature (\textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{30}\boldsymbol{^\circ} \textbf{C}). Exposing these tips to colder or warmer temperatures is likely to compromise the seal between the PTFE shroud and the electrode surface.
Electrode tips with PEEK or PCTFE shrouds are available and are better suited for use at elevated temperatures.

icon_info.jpgNOTE:

After each use of rotating electrode (or electrode tip), clean and dry the electrode and then return it to the plastic storage box in which it was originally shipped.

icon_info.jpgNOTE:

A polishing kit is available for use in restoring the electrode surface to its original mirror smooth finish. A slurry of microscopic abrasive particles may be used to routinely repolish the electrode surface (usually at the end of each day). In the event of very serious damage to the electrode surface, it is generally better to return the electrode to the factory for professional repolishing.

5.2 Shafts

The rotator accepts a variety of different shaft designs (each sold separately) having a sturdy metal internal shank that is insulated with a polymeric shroud. The upper portion of the shaft is designed to mate with the motor coupling inside the brush chamber (see Figure 4.2). The lower portion of the shaft is protected with a chemically resistant shroud material (PTFE, PEEK, or PCTFE).

Standard Shafts

Standard RDE & RCE Shaft (12 mm OD)

MSR-Shaft-AFE3M.jpg

The Standard RDE & RCE Shaft (12 mm OD) has a PTFE shroud and is compatible with E3 and E4TQ Series RDE tips as well as classic 12 mm OD RCE tips. Further information and purchase details are available.

Precision Shafts

Precision RDE & RRDE Shaft (15 mm OD)

MSR-Shaft-AFE6MB.jpg

The Precision RDE & RRDE Shaft (15 mm OD) is specifically designed to mate with the gas purged bearing assembly. The shaft is compatible with E5, E5TQ, E5HT, E6, E6R2, & E7 Series Tips. Further information and purchase details are available.

Precision RCE Shaft (15 mm OD)

MSR-Shaft-AFE9MBA.jpg

The Precision RCE Shaft (15 mm OD) is specifically designed to mate with the gas purged bearing assembly and accepts cylinder inserts. Further information and purchase details are available.

Bearing Assemblies

Gas-Purged Bearing Assembly (15 mm ID)

Bearing-Assembly-15-mm-ID-gas-purged-AC01TPA6M.jpg   Bearing-Assembly-15-mm-ID-gas-purged-example-use.jpg

The Gas-Purged Bearing Assembly is precision-machined to enable the air-free performance of RDE, RCE, and RRDE experiments that utilize a precision 15 mm OD shaft. Further information and purchase details are available.

Simple Taper Plug Assembly (6.35 mm ID)

Bearing-Assembly-12-mm-ID-AC01TPA.jpg

The Simple Taper Plug Assembly enables users working with a Standard RCE or RDE shaft to perform air-free experiments. Further information and purchase details are available.

5.3 RDE Tips

The rotator is compatible with a variety of RDE tips (sold separately), and each tip design is compatible with one or more shafts as described below.

E3 Series

E3TPK Series RDE Tips (PEEK shroud)

E3TPK-Series.png

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{2500 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{2500 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{10}\boldsymbol{^\circ} \textbf{C} to \textbf{80}\boldsymbol{^\circ} \textbf{C}.

Do not use this electrode outside the operating temperature range.

icon_corrosive.jpg

CHEMICAL INCOMPATIBILITY:

Shrouds fabricated from PEEK may be discolored by prolonged exposure to concentrated acids.

The E3TPK Series RDE Tips (12 mm OD PEEK shroud) fit the standard RDE shaft and their 5 mm disks can be constructed with many different materials. Further information and purchase details are available.

E3T Series RDE Tips (PTFE shroud)

RDE-Tip-E3-Series.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{2500 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{2500 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{25}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

The E3T Series RDE Tips (12 mm OD PTFE shroud) fit the standard RDE shaft and their 5 mm disks can be constructed with many different materials. Further information and purchase details are available.

E4 ChangeDisk Series

E4TQ Series ChangeDisk RDE Tips

AFE4TQ050_with_disks.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{2000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{2000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{25}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

The E4TQ Series ChangeDisk RDE Tips (12 mm OD PTFE shroud) accept a removable disk insert; Pine Research offers a variety of disk insert materials. These tips fit the standard RDE shaft. Further information and purchase details are available.

E5 Series

E5TPK Series RDE Tips (PEEK shroud)

E5TPK-side-view.png

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{3000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{3000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{10}\boldsymbol{^\circ} \textbf{C} to \textbf{80}\boldsymbol{^\circ} \textbf{C}.

Do not use this electrode outside the operating temperature range.

icon_corrosive.jpg

CHEMICAL INCOMPATIBILITY:

Shrouds fabricated from PEEK may be discolored by prolonged exposure to concentrated acids.

The E5TPK Series RDE Tips (15 mm OD PEEK shroud) fit the standard RRDE shaft. The electrode disk is 5 mm OD and can be constructed from a variety of materials. Further information and purchase details are available.

E5T Series RDE Tips (PTFE shroud)

RDE-Tip-E5-Series.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{3000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{3000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{25}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

The E5T Series RDE Tips (15 mm OD PTFE shroud) fit the standard RRDE shaft. The electrode disk is 5 mm OD and can be constructed from a variety of materials. Further information and purchase details are available.

E5/E6 Series ChangeDisk

E5TQ Series ChangeDisk RDE Tips (PTFE or PEEK shroud)

AFE5TQ050PK_with_disks.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{2000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{2000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

icon_corrosive.jpg

CHEMICAL INCOMPATIBILITY:

Shrouds fabricated from PEEK may be discolored by prolonged exposure to concentrated acids.

The E5TQ Series ChangeDisk RDE Tips (15 mm OD shroud composed of PTFE or PEEK) fit the standard RRDE shaft. The electrode disk is 5 mm OD and can be constructed from a variety of materials. A thin, hydrophobic PTFE seal (known as a “U-cup”) surrounds the disk insert when it is mounted in the shroud. Further information and purchase details are available.

5.4 Single-Piece RDE Designs

E2MPK Series FastSpeed RDEs (PEEK shroud)

Pt_GC_AU_001.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{7000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{7000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_no_power.jpg WARNING:

Rotating shaft. Use extreme caution when operating the rotator at rotation rates above  \textbf{2000 RPM} . Always secure the enclosure around the rotator before rotating the electrode (see Figure 4.6).

AVERTISSEMENT:

Arbre en rotation. Soyez extrêmement prudent lorsque vous utilisez le rotateur à des vitesses de rotation supérieures à 2000 tr/min. Fixez correctement le boîtier autour du rotateur du rotateur avant de mettre l’électrode en rotation (voir figure 4.6).

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{10}\boldsymbol{^\circ} \textbf{C} to \textbf{80}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

These single-piece rotating disk electrodes are ideal for applications requiring a high rotation rate (up to 7000 RPM). Each electrode features a 5 mm OD disk sealed inside a 12 mm OD PEEK shroud. Further information and purchase details are available.

E2M Series FastSpeed RDEs (PTFE shroud)

AFE2M050PT.png

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{7000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{7000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_no_power.jpg WARNING:

Rotating shaft. Use extreme caution when operating the rotator at rotation rates above  \textbf{2000 RPM} . Always secure the enclosure around the rotator before rotating the electrode (see Figure 4.6).

AVERTISSEMENT:

Arbre en rotation. Soyez extrêmement prudent lorsque vous utilisez le rotateur à des vitesses de rotation supérieures à 2000 tr/min. Fixez correctement le boîtier autour du rotateur du rotateur avant de mettre l’électrode en rotation (voir figure 4.6).

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{25}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

These single-piece rotating disk electrodes are ideal for applications requiring a high rotation rate (up to 7000 RPM). Each electrode features a 5 mm OD disk sealed inside a 12 mm OD PEEK shroud. Further information and purchase details are available.

5.5 RRDE Tips

All RRDE tips have 15 mm OD shrouds made from either PTFE or PEEK. The ring electrode is permanently mounted in the RRDE tip, but the disk electrode may be permanently mounted or removable.

ChangeDisk RRDE Tips

E6 Series ChangeDisk RRDE Tips (PTFE shroud)

RRDE-Tip-E6-Series.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{3000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{3000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{25}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

The E6 Series ChangeDisk RRDE Tips (shroud composed of PTFE) fit the standard RRDE shaft. The electrode disk insert is 5 mm OD and can be removed and replaced with a variety of different materials. A thin, hydrophobic PTFE seal (known as a “U-cup”) surrounds the disk insert when it is mounted in the shroud. Further information and purchase details are available.

E6PK Series ChangeDisk RRDE Tips (PEEK shroud)

AFE6R1AU_with_disks.png

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{3000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{3000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{10}\boldsymbol{^\circ} \textbf{C} to \textbf{80}\boldsymbol{^\circ} \textbf{C}.

Do not use this electrode outside the operating temperature range.

icon_corrosive.jpg

CHEMICAL INCOMPATIBILITY:

Shrouds fabricated from PEEK may be discolored by prolonged exposure to concentrated acids.

The E6PK Series ChangeDisk RRDE Tips (shroud composed of PEEK) fit the standard RRDE shaft. The electrode disk insert is 5 mm OD and can be removed and replaced with a variety of different materials. A thin, hydrophobic PTFE seal (known as a “U-cup”) surrounds the disk insert when it is mounted in the shroud. Further information and purchase details are available.

Fixed-Disk

E6R2 Series RRDE Tips

E6R2-RRDE-side-view.png

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{3000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{3000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{10}\boldsymbol{^\circ} \textbf{C} to \textbf{80}\boldsymbol{^\circ} \textbf{C}.

Do not use this electrode outside the operating temperature range.

icon_corrosive.jpg

CHEMICAL INCOMPATIBILITY:

Shrouds fabricated from PEEK may be discolored by prolonged exposure to concentrated acids.

The E6R2 Series RRDE Tips (shroud composed of PEEK) fit the standard RRDE shaft. The electrode disk is 5.5 mm OD, and there is a thin, hydrophobic PTFE gap between the permanently mounted disk and ring electrodes. Further information and purchase details are available.

E7 Series ThinGap RRDE Tips

AFE7R8PTPT_angled_001.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{3000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{3000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{25}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

The E7 Series ThinGap RRDE Tips (shroud composed of PTFE) fit the standard RRDE shaft. They feature a thin PTFE gap (180 or 320 micrometer) between the permanently mounted disk and ring electrodes. Further information and purchase details are available.

5.6 RCE Tips

15 mm OD RCE Tips

Complete rotating cylinder electrode (RCE) systems for the MSR rotator are available. These systems use a  \text{15 mm} diameter cylinder geometry.

A typical  \text{15-mm OD} RCE system includes a  \text{15 mm OD} RCE shaft, a one liter corrosion cell equipped with a center-port gas-purged bearing assembly, a means of heating the contents of the cell, and other accessories.

The RCE shaft accepts standard cylinder samples ( \text{15 mm OD} \times \text{6.3 mm} tall) fabricated from carbon steel or various stainless steels.

RCE15_overview.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{4000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{4000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{10}\boldsymbol{^\circ} \textbf{C} to \textbf{80}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

Further information and purchase details are available.

12.0 mm OD RCE Tips

Legacy users of  \text{12 mm} RCE systems are encouraged to begin working with the newer  \text{15 mm} RCE geometry; however, the  \text{12 mm} geometry remains available.

RCE-Tip-12-mm-OD-fixed.jpg

icon_caution.jpg

CAUTION:

Maximum Rotation Rate:  \textbf{2000 RPM} Do not rotate at rates higher than the maximum rotation rate.

ATTENTION:

Vitesse de rotation maximum:  \textbf{2000 TR/MIN} Ne mettez pas l’appareil en rotation à des vitesses supérieures à la vitesse de rotation maximum.

 

icon_heat.jpgTEMPERATURE LIMITATIONS:

OPERATING TEMPERATURE RANGE: \textbf{15}\boldsymbol{^\circ} \textbf{C} to \textbf{25}\boldsymbol{^\circ} \textbf{C} Do not use this electrode outside the operating temperature range.

Legacy 12 mm OD RCE tips accept cylinder inserts fabricated from carbon and stainless steel (shroud composed of PTFE, other inserts available upon request) and fit the standard RDE/RCE shaft. Further information and purchase details are available.