200 hour Salt Spray per ASTM B 117 - What should be reported?

[jkittle]

I have a part that is suppose to pass a 240 hour salt spray results per ASTM B 117.

Any know what should be reported on the report for this test?

I'm was looking for somthing more than just "PASSED"

 

[Marc]

Well, the question is what are you testing? For example, paint on metal? A stainless steel part?

Your customer requirement should tell you what their expectations are. Are they looking at corrosion on the part, or paint adhesion, or surface finish?

Where is the salt spray test called out? On a print?

 

[bobdoering]

Normally Salt Spray results included photos of the part (best before and after), and statements concerning whether any corrosion was present. For example, chromate plating testing would identify if the presence of any white corrosion and/or red corrosion. The customer spec, print, etc., should have the requirements of passing or failing the test- such as "No red rust present."

 

[Jim Wynne]

Normally Salt Spray results included photos of the part (best before and after), and statements concerning whether any corrosion was present. For example, chromate plating testing would identify if the presence of any white corrosion and/or red corrosion. The customer spec, print, etc., should have the requirements of passing or failing the test- such as "No red rust present."

That's almost always the way it works. If you know the thing "passed," then you must also know the criteria, or you couldn't say it passed. In your report, state the specifications and what you observe when the test is over. If your customer specifications just say something like, "must pass 200-hours salt spray per ASTM B117," you don't have enough information and you need to get firm criteria from the customer.

 

[bobdoering]

The pictures are also important, in that most salt spary test results are visual perception, and the photos allow anyone else to determine if the visual assessment was aligned to their judgement, also.

 

[Jim Wynne]

The pictures are also important, in that most salt spary test results are visual perception, and the photos allow anyone else to determine if the visual assessment was aligned to their judgement, also.

Yes, pictures are good, and should be included in the report.

ETA: I once had to deal with a customer whose specification (for Zn/clear chromate on steel) said "No change in appearance after x hours ASTM B117 salt spray," which is pretty much impossible. The specifications have to be objective.

 

[Al Rosen]

MIL-STD-810 has some guidance in this area.