Salt spray or cyclic corrosion analysis

Paul Boughton

Ascott Analytical corrosion test chambers, the latest series of which has recently been introduced, are widely known for their capability and testing accuracy.  

Available in a choice of sizes, units can either provide a salt spray or cyclic corrosion analysis over time – the latter designed to mimic ‘real life’ conditions.  

The versatility of salt spray and cyclic corrosion test systems from Ascott Analytical Equipment Ltd was demonstrated with an adaptation of its latest range of chambers to suit the testing requirements of major international car manufacturer, Renault.  

Because the tailored modifications match the precise needs of the vehicle producer, they are of significance not only to Renault itself, but also to Renault suppliers worldwide.[Page Break]

The modifications for Renault are based specifically on a CC1000iP unit, which has a 1000 litre capacity, and are centred on a kit that comprises a series of special attachments.  

Chris Gates, Managing Director of Ascott Analytical, highlights the key requirements: “The test chamber accessories have been designed to meet Renault’s D17 2028 cyclic corrosion test standard, which is commonly referred to in the automotive industry as the ECC-1 test,” he explains.  

“Where typical usage will see salt spray solution sprayed at a rate of 1 to 2 ml/80cm²/hour, Renault’s requirements are for a higher fall-out rate over a shorter period of time.  ECC-1 requires a fall-out rate equivalent to 5 ml/80cm²/hour to be delivered over a 30 minute ‘pollution’ phase followed by precisely controlled variations in humidity at a single set temperature of 35ºC.”  [Page Break]

He points out that this configuration enables parts under test to mimic closely Renault’s vehicle road test results.  

As with all Ascott Analytical corrosion testing chambers, the units that meet Renault’s specification are based on an ergonomically, easy to operate layout.  This includes a pneumatically operated canopy located at a height for easy loading and which includes a large viewing window. Operation is via a touch sensitive, user-friendly control panel.

“The additional modifications to meet Renault’s specification include a system for delivering high salt spray fall-out rates at maximum homogeneity, purpose designed support racks for specific components, a wall wash facility, an insulated viewing window and a salt solution consumption sensor,” adds Chris Gates who points out that Ascott Analytical is represented in France and in all French-speaking countries by Labomat Essor.

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