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Salt Fog Corrosion Test | Lock Body Opening-Closing Cycles Test | 304 Stainless Steel Test
  
Salt Fog Corrosion Test

1. TOOLS

1.1 Salt Fog Corrosion Test Chamber

1.2 Air Compressor

1.3 Sodium chloride

1.4 Distilled water

2. SAMPLING

We sample in accordance with ISO 3786:1976 – “Sampling of coatings for the light industrial products - neutral salt spraying test”.

3. TESTING PROCEDURE

3.1 We mix salt into water until we reach a 5% saline solution (this is roughly the salt concentration
      of sea water). We pour the saline solution into the corrosion test chamber’s bucket up to the
      required level.

3.2 We Label the samples properly and then place them into the chamber.

3.3 We ensure the salt fog equipment and the air compressor are in fine operating mode and then
      switch them on. Once the temperature in the chamber reaches 35 degrees and the
      temperature of the saline solution reaches 37 degrees, we adjust the timer and switch on the
      atomizer. We then let the humid and pressurized air combine with the salt solution and be
      sprayed onto the samples.

3.4 Every 2-4 hours we uncap the machine, verify the samples' condition and complete the
     corresponding test record.

3.5 When the time is up, we switch off the equipment and dry the samples in open air.

3.6 We assess test results on the samples per GB/T6461-2002 (see below) and complete the
     corresponding quality record.

4. ASSESSING TEST RESULTS

Defect area: %/A/%

Grade

No defect

10

0 <
A
≤0.1

9

0.1<
A
≤0.25

8

0.25<
A
≤0.5

7

0.5<
A
≤1.0

6





The most basic requirement is for samples to reach minimum grade 6 after 24 hours testing. Different products, applications and clients may have different requirements.