COPPER CUM SILVER CORROSION BATH - ASTM D130, IP 227

Introduction

The Copper Strip Tarnish Test assesses the relative degree of corrosivity of petroleum products, including aviation fuels, automotive gasoline, natural gasoline, solvents, kerosene, diesel fuel, distillate fuel oil, lubricating oil and other products. This bath also tests the corrosiveness of aviation turbine fuels towards silver as per IP 227.

A polished copper strip/Silver strip is immersed in fuel sample at elevated temperature. After the test period, the strip is examined for evidence of corrosion and a classification number from 1-4 is assigned, based on a comparison with the ASTM Corrosion Standards. 

Technical Specifications

1. Compact and unique design
2. Aesthetically exterior appearance
3. Double walled water bath
4. Inner chamber is made of mirror polished  Stainless steel 304 grade material for corrosion resistance effect.
5. Exterior body is made of S.S.304
6. Gap between inner chamber and exterior body is supplied with 65 mm thick insulation to prevent thermal heat loss.
7. Temperature of the bath is controlled by Micro Processor Based Auto Tune Digital PID Temperature Controller Cum Indicator.
8. Operating temperature : 5 °C above ambient to 100 °C
9. Temperature resolution : 0.1 °C
10. Temperature control accuracy : ± 0.5 °C at 50 °C & 100 °C
11. Temperature Sensor : Probe type Pt  100 Sensor
12. Bath Media : Water or Oil
13. Safety device : Over  Temperature Alarm system to warn the operator/Low liquid level controller with auto cut off
14. Operation on : 230 Volt, 50 Hz, Single Phase, AC Supply
15. Immersion Heaters are of stainless steel material which are fitted within the chamber
16. Heaters are designed such that they have Long life and high safety zone 
17. Stirring is accompanied by stainless steel stirrer with peddles, which will cause the uniform temperature distribution throughout the chamber.
18. Stirring operation is supported through grease seal for reduced condensation losses.
19. Temperature controller is isolated from vapors to prevent any damage to the electronic circuit.
20. The bath has six test stations, each supplied with a lid and hook for suspending either a copper corrosion test vessel (copper corrosion test) or a test tube support (silver corrosion test). 
21. A test tube support can hold up to three test tubes at a time for silver corrosion test. 
22. Any combination of copper corrosion vessels and test tube supports may be used to conduct the experiments.

Following Accessories required to perform the test and supplied at extra cost

1. Copper Corrosion test vessel, stainless steel with O rings, screw type cap, for use up to 100 psi. - 1 No                   
2. Laminated double sided comparison chart INDIAN OR ORIGINAL IMPORTED FROM ASTM (Separate for Copper and silver corrosion)            
3. Copper Strips, 3" x 0.5" x 12 SWG, (Pack of 3)
4. SILVER TEST STRIPS, 99.9% purity (pack of 5)
5. GLASS SUPPORT CRADLE, to accept silver test strip
6. Cold finger Condenser for silver strip test as per IP 227
7. Bench top vice to hold up to 5 strips for polishing.
8. Test Tubes of 25 mm diameter & height 150 mm.
9. Test Tube stand, Up to hold 4 amber test tubes of 350 ml capacity, 50 mm diameter & height 245 mm of tube.
10. Vented stopper made from silicon rubber for test tube