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. A polished copper strip is immersed in 30mL of 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 Copper Strip Corrosion Standards. For aviation fuels and natural gasoline, the sample tube is placed inside a stainless steel pressure vessel during testing.

Thermostatically-controlled water bath immerses Copper Strip Corrosion Test pressure vessels at the required depth per ASTM specifications. It is used for testing aviation gasoline, aviation turbine fuel and natural gasoline. It has a fully-insulated, double-wall stainless steel construction. Soxhlet reflux condenser and constant water level device maintain proper working depth. There is a choice of four-pressure vessel and eight-pressure vessel models. Optional removable test tube rack converts four-pressure vessel model for testing of products not requiring corrosion pressure vessel. The precision-machined stainless steel pressure vessel inserts in copper corrosion bath for testing aviation fuels and natural gasoline. The vessel withstands test pressure of 100psi (689kPa) per specifications. Threaded cap with O-ring gasket and knurled circumference tightens by hand to a positive seal. A 1⁄8" groove in the pressure vessel threads permits safe, gradual release of pressure when opening the pressure vessel.

Note that this product has been discontinued. As a result, some parts listed below may be limited or unavailable. 

• K25309 Optional Test Tube Rack for 8-pressure vessel Bath
• K25200 Copper Strip Corrosion Test pressure vessel
• K25080 Copper Test Strip. 12.5x1.5-3.0mm x 75mm to ASTM specifications
• 332-004-004 Test Tube. 25 x 150mm
• 332-004-002 Viewing Test Tube. Protects copper strip during inspection or storage
• K25100 ASTM Copper Strip Corrosion Standards. Colored reproductions of tarnished strips encased in a plastic plaque
• 380-220-001 Silicone Carbide Paper, FEPA Grade, 220 grit. For polishing of copper strips prior to testing - Pack of 50 sheets
• 380-150-003 Silicone Carbide Grain, FEPA grade, 150 grit. For final polishing of copper strips prior to testing - 1 lb package
• K25000 Polishing Vise. Holds copper strip firmly in place without marring the edges. Stainless steel, mounted on a composition base
• K25090 Multi-Strip Polishing Vise. Similar to K25000 but capable of holding four strips at a time
• 250-000-12F ASTM 12F Thermometer. Range: –5 to +215°F
• 250-000-12C ASTM 12C Thermometer. Range: –20 to +102°C

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