Whether for harness accessories such as connectors, terminals, buckles, or harness assemblies, DV testing cannot bypass salt spray testing.
When a car or truck is walking, the location of the wire harness connector may come into contact with water splashing on the tires, especially after snow in the northern winter, when salt is used to speed up the melting of snow on the road. These connectors usually require salt spray testing to verify corrosion resistance.
The standard for wire harness salt spray test validation is to check the reliability of contact resistance, not the appearance. These connectors are often used with sealing rings to improve salt spray resistance.
Connector terminal tinning product salt spray test
Many enterprises use salt spray for incoming inspection of connector terminal tinned products, and to monitor their appearance.
The connectors tested may not be exposed to salt or Marine environments at all, and the products are likely to be installed in a protected environment where the use of salt spray testing does not demonstrate consistency with the actual application.
There is a layer of oxide film on the surface of tin plating products, and the main failure mechanism is fretting corrosion after coordination. In this case, the salt spray test has no relationship with its failure mechanism.
Even if the oxide layer on the surface turns black after the salt spray test, in practical use, the matching terminal can easily remove the oxide layer and contact the pure tin inside to form a gold connection.
Salt spray tests have no acceleration factor, and salt spray past 48 hours is not indicative of how many years the product will last under certain conditions.
Environmental reliability testing equipment is widely used in the level from raw materials, components, to the level of a circuit board/module, water heater products such as electronics, electrical appliances, power of constant temperature, constant humidity and temperature changes.
Conclusion
It also applies to salt fog test, the mixed gas test, ozone ageing test, UV ultraviolet accelerated ageing test, lamp ageing test, sulfur dioxide corrosion test, high Air low-pressure test, IPX1 ~ 8 waterproof rank test, dust/sand dust test, drop test, combustion test, a half-sine wave/trapezoidal acceleration shock test, sine/random vibration test, collision simulation test, drop test, the tensile strength test, fatigue test, the test and highly accelerated life test screening machinery, mechanical stress and environment, climate environmental testing and the integrated environment Pilot project.