acceptable methods for cleaning sdye pen penetrant 1

[Tmoose]

The instructions on the can of Sp*t Ch*ck say removing the penetrant must be done by wiping with solvent moistened rags, etc. No rinsing or flushing permitted.

Was it always so? I used Zyglo 20-ish years ago and or procedure was to use an initial quick rinse.

thanks

Dan T

 

[CoryPad]

Dan,

There are different types of liquid penetrants: post-emulsification, water-washable, and solvent-removable.

 

[stanweld]

The requirement for removing excess solvent removable penetrant by wiping with solven moistened paper/cloth has been in existance in ASME V for at least 30 years. I have seen instruction on some DIN penetrants near 27 years ago that stated to wash the excess penetrant with the solvent sprayed directly from the canister - it is noted that special low pressure spray canisters were employed.

I ran comparison tests of both methods at that time, and conclusively determined that the ASME V method produced the better results, especially with regard to shallow, tight cracks.

 

[Tmoose]

Our method was a condensing 1-1-1 trichlor tank.
I'll probably die a horrible death from using that thing.
~zero pressure and gentle flow.

The match numbers stamped in aluminum connecting rods would often hold enough fluorescent green penetrant to created a strong nuisance indication when hit with developer.

I tried it a few times on steel parts with genuine crackers as detected with wet fluorescent mag particle, and mag particle was 10x much more sensitive, and reliable.

 

[hogan666]

The theory of using a solvent moistened rag is to not remove penetrant from any indications. If you were to flush or dip the part there is a chance of removing all penetrant. Typically I will wipe the excess penetrant off with a dry cloth, then with a solvent moistened rag. This will remove all background penetrant without cleaning out the penetrant out of cracks or other indications.

 

[ANII1085]

See Article T-673, T-673.1 T-673.2 and T673.3 of ASME Section V 2004 Edition.

ANII1085

 

[ornerynorsk]

In Crown's dye penetrant kit, the cleaning spray will wash out the penetrant from any fissures or cracks, and render the test useless. This is the only test method we've used for the past 23 years, so i can't offer insight as to any other manufacturers recommendations.