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Stabilant 22 Contact Enhancer Application Notes

App. Note 39 - Stabilant use on PLCC's

What is Stabilant 22?

Stabilant 22 is an initially non-conductive block polymer which when used in a thin film between metal contacts becomes conductive under the effect of an electric field. This occurs at an electric field gradient such that the material will remains non-conductive between adjacent contacts in a multiple pin environment. In addition Stabilant 22 exhibits surfactant action as well as lubrication ability providing a signal component resident solution to virtually all contact problems. When applied electromechanical contacts, Stabilant 22 can provide the connection reliability of soldered joint without bonding the contact surfaces.

How can Stabilant 22A/22E improve the performance of PLCCS?

Stabilant 22A or Stabilant 22E provide a quick an effective way of increasing the reliability of PLCC devices through improvement of the device connections.

Stabilant 22 Contact Enhancer Application NotesThe application is simple. Using the dropper-insert on the 15 mL or 50 mL bottle of Stabilant 22A (or 22E),apply small amount to the connections on the edges of the device and/or o the contacts in the socket before insertion of the device.
A soft camel's hair brush can also be used to spread the material some saving in the amount that has to be applied. As Stabilant 22A or Stabilant 22E is just the Stabilant 22 concentrate thinned 4:1 with an alcohol, the diluant will evaporate leaving a thin film of the concentrate resident on the contacts. Note that from 0.25 t 0.5 Mil film-thickness of the concentrate is all that is required. The concentrate has a very low vapor pressure, and a life expectancy of over 12 years in service During application the usual precautions should be taken against static discharge.

Is Stabilant 22 just another contact cleaner?

No, Stabilant 22 is a resident potentially electrically-active material which through a synergistic combination of effects enhances conductivity within a contact without causing leakage between adjacent contacts. Thus large quantities of the material do not have to be "hosed" on as is the case with cleaners.

Is Stabilant 22 cost effective?

As Stabilant 22 can be quickly applied to all contacts and connectors in a system, the often difficult diagnostic determination as to which one of many contacts are erratic, can often be eliminated. This can significantly reduce service time in the field and in many cases eliminates the need to return boards for shop service or remanufacturing. As any service manager knows, the diagnosis of electronic problems, especially where intermittent failures are concerned, is often much more difficult than the actual part replacement; as well as requiring service personnel of exceptional caliber. In many cases the use of Stabilants can thus increase the efficiency of existing staff as well as allowing many connector-related problems to be handled at a much lower cost.

How does Stabilant 22 work?

Contact failure is rarely caused by a single factor. Thus, treatments that solve only one problem don't necessarily offer a reliable long term solution. For example, cleaners do not prevent the re-entry of contaminants or the reformation of contaminant films; nor do they offer any lubrication. They must be used each time a connector gets dirty. Lubricants in themselves are rarely cleaners. Corrosion inhibitors are neither cleaners nor lubricants and are often specific to one type of metal or plating. Unsaturated oils used as contact treatments can cross-link under the influence of elastomer or thermoset plastic curing agents and accelerants.

While resident in the connector, Stabilant 22 performs several concurrent functions. Its very presence in the contact gap will prevent the entry of outside contaminants. It has sufficient surfactant action to lift surface contaminants and hold them in suspension. In cases where corrosion products are present Stabilant 22 will penetrate them and prevent rectification effects. Due to its high dielectric constant it will act to form a capacitative layer which is in parallel with whatever residual resistance exists in the contact increasing the passage of AC signals. Given sufficient DC bias within the gaps of the contact the thin film of Stabilant will "switch", conducting by quantum tunneling and thus limit the resistance of the contact to a serviceable level.

Is it environmentally acceptable?

Yes. Stabilant 22 itself is non-toxic and only the isopropanol-diluant in Stabilant 22A represents a flammability and a very minor health hazard.

Even Stabilant 22A has only about 11200th the solvent impact as conventional contact cleaning solvents over a three year time span. As Stabilant 22 contains no solvent, it has absolutely minimal environmental impact and is, therefore, becoming the treatment of choice for many service organizatios!

Can Stabilant be used by untrained personnel?

Thousands of applications of the consumer version of Stabilant 22 have been made over a period of several years now without any reported problems.

What is the best way to apply Stabilant to a contact?

The 15 mL and 50 mL containers have a "dropper" type caps that allow Stabilant 22A/22E to be applied directly to such components as socketed IC's, switches, connectors, etc. Some en users prefer to use industrial syrettes to apply the material. Camel's hair brushes ca be used to brush it on card-edge connectors or they could be dipped into the dilute material. Most metering-type liquid dispensing systems can be used as well.

Does the action of Stabilant deteriorate with age?

No. Stabilants have been used in military applications for almost fifteen years and are also being employed in Avionics, Flight-instrumentation, Computers, Automotive Process controls, Bio-medical electronics, and telecommunications, to name but a few of the fields where they have been used to meet major reliability requirements. There, they have proven themselves as an efficient, long-term solution to both eliminating and preventing connection problems.

In some field trial applications lasting over twelve years Stabilant 22 has shown n sign of reduced effectiveness. With a high molecular weight and a very low vapor pressure, little is lost by evaporation. Unlike some other contact protection oil, Stabilant 22 will not cross-link when exposed to free-machining materials such a high-sulfur brass, or when used on contacts where agents used to promote cross linking of thermosets or elastomers are present in the environment or in the actual connector components. Unlike non-saturated oils, Stabilant 22 does not "varnish".

Revision 2


Stabilants are a product of Dayton Wright research & development and are made in Canada

NSCM/Cage Code - NATO Supply Code 38948

15 mL of S22A has NATO Part # 5999-21-900-6937


The Stabilants are patented in Canada - 1987; US Patent number 4696832. World-wide patents pending. Because the patents cover contacts treated with the material, a Point-of-sale License is granted with each sale of the material.

MATERIAL SAFETY DATA SHEETS ARE AVAILABLE ON REQUEST


Stabilant, Stabilant 22, and product type variations thereof are Trade Marks of D.W. Electrochemicals Ltd.

İ Copyright 2003 - D.W. Electrochemicals Ltd. This note may be reproduced or copied, provided its content is not altered. The term "contact enhancer", İ 1983 Wright Electroacoustics.


NOTICE: This Application Note is based on customer-supplied information, and D.W. Electrochemicals is publishing it for information purposes only. In the event of a conflict between the instructions supplied by the manufacturer of the equipment on which the Stabilant material was used, and the service procedure employed by our customer, we recommend that the manufacturer be contacted to make sure that warranties will not be voided by the procedures.

While to our knowledge the information is accurate, prospective users of the material should determine the suitability of the Stabilant materials for their application by running their own tests. Neither D.W. Electrochemicals Ltd., their distributors, or their dealers assume any responsibility or liability for damages to equipment and/or any consequent damages, howsoever caused, based on the use of this information.

Stabilant, Stabilant 22, and product type variations thereof are Trade Marks of D.W Electrochemicals Ltd.

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Stabilant
Stabilant 22 Contact Enhancer

Stabilant 22 Contact Enhancer

We carry the complete line of Stabilant products. Looking for something not listed here? Please contact us.
Stabilant 22
APPLICATION NOTES
1. Electronic Equipment
2. Computer cards
3. Schadow switches
4. Mic connectors
5. RTS & Dual plug patch bays
6. Biomedical Electronics
7. Computing & Peripherals
8. Cable TV
9. Robotics
10. Environmental Impact
11. Recording studios
12. Broadcast equipment
13. Mobile Radio
14. Educational computing
15. Stereo systems
16. Aid to IC insertion
17. Navigational equipment
18. Card edge conn. problems
19. Complex process control
20. Automotive service
21. Gold plating/solder alloy
22. Very high humidity
23. High current thermal runaway
24. Car stereo systems
25. Plastic element pots.
26. Farm machinery & trucks
27. Model & hobby
28. RF case seals
29. Outdoor environments
30. Computer crashes
31. Relays & switches
32. Silicone problems
33. Tin-plated contacts
34. Solder flux & resin residue
35. Post application color tinting
36. Aircraft connectors w/ flurosilicones
37. Avoiding unsafe solvents
38. S22 R&D Design Goals
39. Stabilant use on PLCC's
40. Sensor problem solution
41. Repair of flood damage
42. Marine electrical & electronics
43. All Cameras & Video Equipment
44. SCSI removable SCA drives, caddies & connections
45. Home Theater & Computer Connectors

Some of these application notes are repetitive of material in other application notes. We realize this. But some were written as a reference to a contact problem in a particular field or application.

NOTICE: This data has been supplied for information purposes only. While to our knowledge it is accurate, users should determine the suitability of the material for their application by running their own tests. Neither R.A.L. Audio Services, D.W. Electrochemicals Ltd., their distributors, or their dealers assume any responsibility or liability for damages to equipment and/or consequent damages, howsoever caused, based on the use of this information.
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Stabilant 22
REVIEWS
Over the years, Stabilant 22 has been highly parsed in publications that target a wide range of electronics applications including:
* Andrew Marshall's Audio Ideas Guide
* BYTE Magazine (7 articles)
* Windows Magazine
* Q.S.T. Amateur Radio
* Model Railroads (2 articles)
* Motor Magazine
Stabilant 22
TECHNICAL NOTES
1. MSDS - Stabilant 22
2. General Information
4. MSDS - Stabilant 22A
5. MSDS - Stabilant 22E
9. MSDS - Stabilant 22L
20. Military Applications
21. Elastomer Compatibility
22. Effectiveness of Stabilants
24. Connector Harmonic Distortion
39. Signal rise time

There are gaps in the sequence numbers below because some Technical Note s were written by the manufacturer for specific companies and are confidential.

NOTICE: This data has been supplied for information purposes only. While to our knowledge it is accurate, users should determine the suitability of the material for their application by running their own tests. Neither R.A.L. Audio Services, D.W. Electrochemicals Ltd., their distributors, or their dealers assume any responsibility or liability for damages to equipment and/or consequent damages, howsoever caused, based on the use of this information.
Stabilant
Stabilant 22 Contact Enhancer

Stabilant 22 Contact Enhancer

We carry the complete line of Stabilant products. Looking for something not listed here? Please contact us.

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