COATING FAILURE SERIES · 1 of 4
ACID & SALT ATTACK
WHY COATINGS FAIL EARLY — PART 1
Where Acid Salts Destroy Coatings From Below
The paint looked perfect. The salt under it never stopped working.
Invisible salt under a coating pulls water through the paint itself. Blisters come in months — not years.
WHERE IT HAPPENS
Pickling & galvanizing sheds — acid fume settles as salt on every beam and duct.
Fertiliser plants — acid areas, prilling towers, ammonium dust everywhere. These salts drink moisture.
Boiler, DG and furnace stacks — SO₂ turns to acid dew on ducts, ESPs and nearby steel.
DM plants, battery rooms, plating shops — acid mist, every working day.
ETPs, smelters, paper and dye houses — acid in the air, salt on the steel.
Coastal industry — sea chloride plus stack acid. The worst mix.
Acid fume attack — pickling shed
Salt-laden air — prilling tower steel
Blisters: salt trapped under the film
WHERE THE SALT HIDES
Undersides rain never washes — worse than exposed faces. Rain rinses. Shelter stores.
Ledges and pockets — dust settles, holds water.
Bolt threads, crevices, weld lines — no wash reaches inside.
The base of every rust pit — exactly where ordinary treatment never goes.
Why the coating fails
Acid salts pull water through sound paint — a pump that never switches off. Water collects at the steel. Blisters lift the film. The acid keeps eating under a coat that still looks fine.
The answer on salted, acid-attacked steel
Wash. Dry. Then Z 704 RUSTEX – NMB. Its multi-chemistry converts rust under the leftover salt — to the base of every pit. Its nano-bond seals the steel with a bond water cannot break. See the Z 704 flyer beside this page.
PROVE IT ON YOUR WORST STEEL
Pick the most salt-attacked steel in your plant. We treat it in front of you. Free.
sales@stanvac.com · +91-8527199811
STANVAC · SURFACE PROTECTION DIVISION
Plot 551, Sector-37, Pace City-II, Gurugram 122001 · +91-8527199811 · www.stanvac.com