How to Restore 100% Shine Finish on Zinc Plated Parts After Acid Over-Attack

Acid Jyada Ho Jane Par Zinc Plated Part Par 100% Shine Finish Kaise Wapas Laye?

Electroplating process mein sabse common problem hoti hai acid over-attack. Jab HCL, sulphuric ya koi aur acid quantity se jyada ho jata hai, to plated part ki natural shine dull ho jati hai, surface burn ho jati hai aur finishing bilkul kharab lagne lagti hai.

Rawat Electroplaters, Faridabad mein hum daily industrial plating mein is problem ko handle karte hain. Is blog mein hum 100% practical aur proven method share kar rahe hain jisse aap acid damage ke baad bhi mirror-like shiny finish

Acid Over Hone Ke Common Signs

Plated surface ka shine dab jana
Grey ya whitish dull layer dikhna
Burn marks ya uneven reflection
Passivation ke baad bhi gloss na aana

Acid Damage Hone Ke Main Reasons

1. HCL Concentration Control Na Hona

Pickling ya activation ke time agar HCL strong ho jaye aur dip time zyada ho jaye, to zinc surface micro-level par rough ho jati hai.

2. Proper Water Rinse Na Hona

Acid ke baad agar water rinse strong aur fresh na ho, to acid residues surface par reh jaate hain jo shine ko kill kar dete hain.

3. Over Activation

Zyada activation ka matlab surface zinc ko dubara eat karna, jo finishing ke liye sabse dangerous step hota hai.

Acid Damage Ke Baad 100% Shine Finish Lane Ka Proven Process

Step 1: Mild Nitric Dip (Controlled)

✔ Nitric Acid concentration: 5–10%
✔ Dip time: 3–5 seconds only

Is step se surface ke micro burn aur dull layer remove hoti hai. Zyada dip bilkul mat dena — warna plating thickness bhi affect ho sakti hai.

Step 2: Immediate Fresh Water Rinse

Nitric dip ke turant baad running water rinse ya double tank rinse zaroori hai. Isse acid reaction turant stop hoti hai.

Step 3: Light Re-Plating (Optional but Best)

Agar pehle plating 7–8 micron thi, to 2–3 micron extra zinc plating dobara dena best rehta hai.

✔ Current: Slightly low
✔ Time: Short & controlled

Step 4: Brightener Boost

Plating bath mein recommended brightener dose maintain karein. Kabhi bhi andaz se brightener add na karein.

Step 5: Proper Passivation + Sealant

✔ Trivalent Yellow / Blue passivation fresh honi chahiye
✔ Sealant use karne se gloss aur corrosion resistance dono improve hote hain

Professional Tips (Factory Level)

HCL tank ka weekly titration check karein
Pickling time stopwatch se control karein
DM water rinse ka use shine ke liye best hota hai
Acid tank ke baad kabhi part ko dry na hone dein

Rawat Electroplaters – Trusted Zinc Plating Experts

Agar aapke parts par acid damage ho gaya hai, to Rawat Electroplaters, Faridabad mein hum shine recovery, re-plating aur premium finishing

Address:
Plot No. 424, 425 & 391, Sector 58,
Faridabad – 121004, Haryana

Call / WhatsApp: 8700710086
Email: rawatplater@gmail.com

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