NES M0140 Salt Spray Test

Developed by Nissan Motor Company between Nissan engineering standards (NES), the NES M0140 standard describes the corrosive salt spray test method for coated or painted metals used for anti-corrosion and decorative purposes in automobiles.

According to this standard, test samples are classified as follows:

• Metal coating, painting, resin coating and the like covered with metallic, inorganic or organic film
• Metallic film and inorganic film applied to the resin by metal plating, vacuum plating, hot stamping and the like
• Metal, stainless steel, aluminum alloy, titanium alloy and the like

The test equipment parts consist of a temperature controlled chamber, test solution chamber, test solution feed tank, air saturator, air compressor and exhaust fan equipped with: spray nozzles, test piece holder and spray collection cup. Test equipment must meet the following conditions.

• The materials used for the equipment parts must not affect the results of the corrosion test and must not corrode themselves during the test.
• The spray nozzle and test liquid should not be sprayed directly on the test pieces.
• Drops of test solution condensed on the ceiling or cover of the test chamber should be prevented from falling on the test specimens.
• Drops of test solution that have fallen from test specimens should not be reused for another test.
• Spray collection containers should be clean and have a 100 mm diameter collection area and two horizontal collection areas of approximately 80 cm each. It should be placed adjacent to the test pieces in more than two positions, closest and farthest from the spray nozzles to ensure a uniform spray pattern.
• The compressed air used to spray the test solution must not contain oil or dust.

The test pieces shall be the product itself or a portion of the product containing the effective surface area. If it is difficult to use the product for testing or if the test results are inconclusive, alternative test pieces are used to represent the product. In addition, the shape, dimensions and number of the test piece should conform to the specifications of the test material or product standard.

Our organization also provides salt spray test services within the scope of NES M0140 standard, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.