ER-83C Hydrophilic Emulsifier

ER-83C Hydrophilic Emulsifier quantity

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Description

ER-83C Properties

ER-83C is a hydrophilic emulsifier used for the removal of excess penetrants with post emulsion on the surface of the RD series. This product is dilatable from 0 to 30% (very high maximum concentration). A surface effect emulsifier without solvation effect, this means it has a little risk of over-emulsification.

Instructions of Use

Spray:
A highly diluted solution of ER-83C is better (0.1% to 3%). However, a greater concentration may also
be used.
The concentration is to be determined according to:

• Pre-washing result,
• Surface condition,
• Attractiveness between part surface and penetrant
• Strength of the spray,
• Dwell time of the emulsifier (washing time + time elapsed before rinsing).

Immersion:
It is recommended to pre-wash parts to eliminate as much excess of penetrant as possible due to mechanical action of water. Then, dip the parts into an ER-83C solution, let drain and rinse with water.

Note 1: It is not necessary to move the parts during immersion, nor to stir the emulsifier. As there is no mechanical agitation or action other than the incoming and outgoing movement, plus the final rinsing, a solution more concentrated than for spraying is required to eliminate the penetrant. The typical concentration is 5 to 20%, but, depending upon the case, more diluted or more concentrated solutions can be used.

Note 2: ER-83C concentration should be regularly checked. The superficial tension of the mixture being very low, water evaporates significantly more quickly than observed on pure water. Therefore, water should be added regularly, because increased concentration inevitably causes greater activity for the  emulsifier. The emulsifier concentration in water can be measured using a refractometer. In addition, the ER-83C solution should be checked for its penetrant content, because contamination with penetrant interferes with the emulsifying process and, after some time, the ER-83C solution should be
replaced. Bubbling is useful to oxygenate the bath and avoid odours of anaerobic bacteria.

Biodegradability

According to the biodegradability test in aerobic and according to OECD 302 B criteria, ER-83C has shown capacities at inherent biodegradability. The sample of ER-83C is ‘inherent biodegradable without pre-adaptation’ and further evidence of an “ultimate inherent biodegradability” according to OECD criteria extrapolated to a finish product. The tests are done on the diluted product alone, unsaturated by penetrant. The result is positive (biodegradability >70%) but this does not mean that the effluents of ER-83C can be released into natural environments, however an effluent discharge into water treatment.

Appearance	Pink Liquid
Flash Point	> 93°C
Viscosity	15 mm2/s +- 10 % at 38°C
Temperature Range	0°C – 50°C

Available in 25L.

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