Stainless Steel test results

 

Laser marks were made on type 304 stainless steel tags
Tags were totally immersed in the test solutions.
 Exposure Time  
Organic Solvents 1 Hour12 Hours24 Hours1 Week
Gasoline No effectNo effectNo effectNo effect
Limonene No effectNo effectNo effectNo effect
Methyl Ethyl Ketone No effectNo effectNo effectNo effect
N-Butanol No effectNo effectNo effectNo effect
Mineral Spirits No effectNo effectNo effectNo effect
Xylene No effectNo effectNo effectNo effect
Acetone No effectNo effectNo effectNo effect
Propylene Carbonate No effectNo effectNo effectNo effect
Ethanol No effectNo effectNo effectNo effect
DMSO No effectNo effectNo effectNo effect
Motor Oil No effectNo effectNo effectNo effect
Acid/Bases 
Hydrochloric Acid 35% No effectNo effectTest stopped - see notes
Nitric Acid 68% No effectNo effectNo effectNo effect
Sulfuric Acid (conc.) No effectNo effectNo effectNo effect
Acetic Acid 99.5% No effectNo effectNo effectNo effect
Hydrogrn Peroxide 30% No effectNo effectNo effectNo effect
Sodium Hydroxide 25% No effectNo effectNo effectNo effect
Ammonium Hydroxide 20% No effectNo effectNo effectNo effect
Other 
Boiling H2O Marks soaked in boiling water for 1 hr. - no effect
LN2 (Cold) Marks dipped in liquid nitrogen - no effect
Flame (Hot) Marks heated in a propane flame until cherry red - metal
 discolors, no effect on mark.
Hot/Cold Cycling Marks heated red hot and immediately plunged in liquid nitrogen
 - metal discolors, no effect on mark
Notes: 
Hydrochloric acid testing: - Acid dissolves the steel tag and was not run over 12 hrs. long
 - After 1 hr. acid dissolved 0.2767 gms off of steel tag (4.7%),
 laser mark was unaffected.
 - After 12 hrs. acid dissolved 1.8057 gms off of steel tag (30.6%),
 laser mark was unaffected, now having a distinctly raised feel.
Sulfuric acid testing: - Acid discolors at approximately 96 hrs., mark appears to be
 slightly discolored.

 

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