SALT SPRAY CABINETS are widely used to test components and coated panels for corrosion resistance throughout the automotive, paint, surface coating, chemical, aerospace, electronic, offshore and defence industries. Salt Spray Tests and found in various. forms in many National, lnternational and Corporate Standards, C & W cabinets are designed to meet and exceed these stringent requirements.
Capacity (litres)
200
450
1000
2000
Size External Maximum (mm) L
1030
1370
1960
2400
W
H
700
930
1335
1200
1050
1130
1410
1645
Size Internal Maximum (mm) L
610
825
1465
2000
W
h1
h2
510
635
1040
1000
455
620
720
850
660
875
1065
1175
Sample Racks (20? to vertical)
4
6
8
12
Panel Capacity (150 X 100)
76
132
344
516
Salt Solution (resevoir 114litre 500 x 600 x 550)
STD
STD
STD
size on request
Eletric (AMP)
13
13
20
30
Compressed Air
FLOW 3.5 c.f.m at 15 p.s.i. Pressure 30 to 60 p.s.i. (2 to 4 BAR) Connection 10mm I.D. Plastic Pipe Type Clean, Dry and Oil Free
Water
Type De-Ionised or Mains Water Below 50mg/litre T.D.S Pressure 30 to 60 p.s.i. (2 to 4 BAR) Connection 10mm I.D. Plastic Pipe
Drain
32mm O.D Plastic Pipe to Liqid Waste. Air Breather / Vent Pipe Connected to Drain To Atmosphere
Standard Features include
EXTERNAL SALT SOLUTION RESERVOIR 114 litres capacity supplied on castors with integral filter; sufficient to allow 10 days continuous Operation. Easy cleaning to prevent algae growth and easy to fill.
 
HEAVY DUTY PERISTALTIC PUMP with VARIABLE SPEED For accurate control of salt solution flow to the atomiser, indispensable for precise collection rates; also eliminates atomiser blockage
 
ACCURATE FLOWMETER Flush mounted, to monitor salt solution flow.
SOPHISTICATED LUCITE ATOMISER For baffle free mist generation ensuring precise fall- out readings throughout the chamber.
 
AIR REGULATOR AND PRESSURE GAUGE To control and monitor the air pressure required for precise salt fog collection rates.
 
TEMPERATURE CONTROL Micro Processor based with full P.l.D. control and resin coated Pt 100 temperature sensor allowing simple keypad settings with accurate digital display. Temperature Range - Ambient to 55? C. +/-1? C.
 
 
INTERMITTENT CYCLE TIMERS for salt spray cycle/dry cycle testing or for pre-set continuous salt spray tests - fully adjustable salt/dry cycles.
 
HOUR METER Re-settable to record test duration or total hours run.
DRY/MOIST (humid) AIR CONTROL Simple switch-over device for required setting, depending upon specified Standard procedure.
 
HUMIDIFIER UNIT Compact internal air saturation unit, fully protected against overheating and low water. Automatic, self-filling system.
 
HUMIDIFIER UNIT TEMPERATURE CONTROL Digital display of water temperature adlustable for different air pressures as specified in Standards.
 
AIR PURGE SYSTEM Designed to enable the swift evacuation of salt mist from inside the chamber and to prevent laboratory contamination when examination of test specimens is required.
 

Correlation Test Results
Salt Spray, Prohesion, Outdoors
These figures show the correlation of test results between Prohesion, Salt Spray (ASTM B117) and outdoor exporures at an industrial site in nortwest Indiana. The Prohesion results were more representative of outdoor corrosion than the salt spray results.
The Prohesion cycle consisted of one hour spray at ambient temperature and one hour dry off at 35 celsius using a solution of 0.40% ammonium sulphate and 0.05% sodium chloride.
Two Coat Latex Medium Oil Alkyd, Inhibitor A
Poor correlation between salt spray and industrial exposure. Fairly good correlation between Prohesion and exterior exposure.
Acrylic Latex Primer/Topcoat System; PVC 34% Volume Solids 40%; Inhibior Loading 0.75 lbs/gal; applied 2 mils per coat (4mils total) to ground Q-Panels.
All panels exhibit good performance
Medium Oil Alkyd System; PVC at 45%; Volume Solids 42%; Inhibitor Loading 1.5 lbs/gal; primer applied to Q-Panels at 1.5 mils dry film thickness.
High Solids Epoxy Medium Oil Alkyd, Inhibitor B
Excellent performance in salt spray with little blistering, no scribe creepage orundercut corrosion, Exterior exposure shows severe delamination from scribe and no correlation with salt spray. Prohesion show blistering and delamination, correlating with exterior exposure.
High Solids Epoxy System; PVC 30.7%; Volume Solids 74%; Inhibitor Loading 1 lb/gal; applied 3.5 mils dry film thickness to ground Q-Panels.
A sharp contrast between Industrial site exposure and salt spray. Salt spray shows complete failure. Prohesion and exterior exposures shows good performance.
Medium Oil Alkyd System; PVC at 45%; Volume Solids 42%; Inhibitor Loading 1.5 lbs/gal; primer applied to Q-Panels at 1.5 mils dry film thickness.

A Comparison of Two Inhibitors
(Medium Oil Alkyd System)
Medium Oil Alkyd System; PVC at 45%; Volume Solids 42%; Inhibitor Loading 1.5 lbs/gal; primerapplied to Q-Panels at 1.5 mils dry film thickness.
After 600 hours salt spray exposure, Inhibitor A is vastly superior to InhibitorB After 4 years Industrial exposure, both systems exhibit good performance, with Inhibitor B slightly superior. Poor correlation with salt spray results. After 600 hours Prohesion exposure, Inhibitor B is marginally better than Inhibitor A. Prohesion results more closely correlate to the industrial exposure.

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