Ardrox® 9813

They are normally used in conjunction with Ardrox® 9881 hydrophilic emulsifier (maximum concentration 10% v/v) and with the Ardrox® 9D4A or 9D1B developer and the Ardrox surface technologies.

Ardrox® 9813 are also approved to the AMS 2644 as Method C, solvent removable penetrants.

Ardrox® 9813 may be applied by brushing, tank immersion or by electrostatic spraying. The following typical process sequence illustrates the recommended method of use for general industrial applications. However, where relevant, the process specifications of the approving authorities must be followed.

Pre-Cleaning

All surface contamination such as rust, paint residues, grease, scale etc. must be completely removed. Ensure that the component is completely dry and not too hot or cold (10-50°C / 50- 122°F).

Penetrant Application

Apply penetrant to the surface and leave for a suitable dwell period. Allow components to drain as necessary. The combined application and drainage period should be at least 10 minutes. If the drain time exceeds 1 hour, the penetrant should be re-applied to the surface.

Remove excess penetrant

Penetrant removal by water washing: 15–35°C (59–95°F) for approx. 1 min. at 1.4-1.7 bar (20-25 psi). Remove excess penetrant by one or a combination of the following methods:

• Air agitated water rinse tank
• Spray rinsing
• Manual spray rinse
• Wipe with a clean lint-free tissue, dampened in Ardrox® solvent remover

The times given are a rough guide only. Practical trials should be carried out to find the optimum.

Emulsify

Immerse in Ardrox® 9881 at maximum 10% v/v in water at ambient temperature for 30–90 seconds. Slight agitation of components is recommended to free any trapped air. Drain for 30 seconds over the remover tank.

Rinse with water

Conditions as for 3.3. It is recommended that this rinse stage be kept separate from the prerinse to facilitate effluent treatment.

Drying

Dry in air recirculating oven at 50–60°C (122–140°F), for 15 minutes maximum. Longer times may be required for larger components. To assist drying, either clean, filtered, low pressure, compressed air (1.7 bar/25 psi maximum) or a hot water dip (80–90°C / 176–194 °F maximum for up to 20 seconds) can be used prior to oven drying. Use the minimum oven time required to obtain thoroughly dry components.

Development

Apply developer Ardrox® 9D4A or Ardrox® 9D1B and allow 10 – 30 minutes developing time before evaluation.

Inspection

When applicable, low pressure, clean filtered air at 0.3 bar/5 psi (maximum) should be used to remove excess powder prior to inspection under black (UV) light, (1000 µW/cm² minimum) in a darkened area.

They are available as bulk material or as aerosol spray cans on special order.

Store Ardrox® 9813 at temperatures between +10 °C and +40°C (50-104 °F), in a dry place, away from oxidizing chemicals and from sources of heat. Avoid direct exposure to sunlight. Shelf-life of Ardrox® 9813 is 36 Months.