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requalification of expired paints & swelling test

requalification of expired paints & swelling test

(OP)
I have three questions:
1- The Epoxy coaltar Paint in my company is expired(according to paint manufacturer data sheet), but I decide to use it again and
claim that is usable.what is the complete tests for re qualfication of expired paints. considering that this paint is used for internal of firewater storage tank.
2-my paint engineer said that swelling test that used for evaluation of attack of tank fluid to paint, shall be employed.what is the swelling test for paints? and this test is required for re qualified of this Paint? for more information one paper about swelling of paint films is attached.
3- what is the detail procedure for adhesion test of Epoxy coaltar Paints According to SSPC-Paint16?

RE: requalification of expired paints & swelling test

1 -- Obviously, that's your choice. Were I your customer, I would immediately cease any business with you for that, given that failure of the paint could cause your sprinklers to fail

3 -- The procedure is available from: http://www.sspc.org/market-place/standards/sspc-pa...

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RE: requalification of expired paints & swelling test

To address the questions:

1) On what basis did you make this decision? Epoxies have a definite shelf life. Did you get a written approval from the manufacturer's technical rep/lab on official letterhead? Note: A letter from a sales rep doesn't count. Given your next sentences, you had no business making this decision. Hire a qualified paint lab, with qualified paint chemists. The testing required varies depending on the coating, and on its uses.

2) See above. Swelling testing is just one of many tests which could be employed.

3) What does Paint 16 say? Did you perform the testing listed in Paint 16? if so, what were the results of new material, and expired material? Viscosity, amine value and EEW are of particular interest.

RE: requalification of expired paints & swelling test

Tar modified epoxies may be carcinogenic... best check out the use and environment...

Dik

RE: requalification of expired paints & swelling test

dik - I think it's pretty settled that they are carcinogenic. We avoid them, though I have worked with them in the past.

RE: requalification of expired paints & swelling test

pog, you have not replied to the questions. Did you expect a blank "Hey, it was okay use it" without more detail?

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