This test method provides a standardized procedure for evaluating the electrical resistance of automotive coolant hose covers. It is known that an electrical potential exists between the engine and the radiator. Coolant hose cover conductivity has been determined to be a factor to reduce hose clamp life when vehicle build variations allow possible contact of the hose or the clamp to metal components on the radiator and engine thus completing an electrical circuit. The ensuing electrical current can undercut the clamp protective coating, leaving it vulnerable to the corrosive effects of road salts, moisture, and other environmental contaminants. SAE Recommended Practice J1684 addresses the electrochemical resistance of the tube portion of the coolant hose.
Rationale
Added potential failure modes of test procedure and precision statements based on round robin test program results. Made corrections and modifications to test set-up.
The Non-Hydraulic Hose Committee develops and maintains SAE Standards, Recommended Practices, Information Reports and appropriate manuals relating to the development of non-hydraulic thermoset and thermoplastic elastomeric hose specifications, such as those used in cooling, fuel, oil, fuel vapor, air management, windshield washer (tubing) and refrigerant systems, which can be either mobile or stationary applications. The task forces formed under the committee's direction include: Low Permeation J2416 Diesel Fuel Hose Fuel Cell/Hybrid Vehicle Hoses Test Method for Non-Conductive Coolant Hose Cover Participants in the SAE Non-Hydraulic Hose Committee include OEMs, suppliers, consulting firms, government and other interested parties.
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Test Method for Evaluating the Electrical Resistance of Coolant System Hose Covers
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Test Method for Evaluating the Electrical Resistance of Coolant System Hose Covers
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