Electroplating Pretreatment in Vietnam: The Ultimate Solution for Zero Blistering (Wax Removal & Electro-cleaning)

In Northern Vietnam (e.g., the sanitary ware hub in Thai Binh, hardware zones in Haiphong), the electroplating pretreatment industry is transitioning from low-end processing to high-end OEM manufacturing. Whether serving brands like TOTO and Kohler, or producing electronic parts for Samsung, the requirement for aesthetic yield is incredibly strict.

However, the biggest headache for Vietnamese platers remains yield fluctuation. Especially for Zinc Alloy (Zamak) and Brass parts, complex shapes and heavy manual polishing residues often lead to blistering, peeling, and pitting after plating.

Hongyi New Materials has studied the local water quality and process habits in Vietnam to develop specialized Wax Remover Series and Electrolytic Degreasing Powder Series, guarding the first line of defense for your plating quality.

Step 1: Conquering Stubborn Wax – Hongyi Wax Remover Series

Manual polishing is the mainstream process in Vietnam, leaving heavy wax residues (white, green, purple wax) in blind holes and inner corners. Traditional solvent cleaning (like TCE) is being restricted by Vietnam’s environmental regulations, while ordinary wax removers are often too slow or corrode zinc substrates.

Core Advantages of Hongyi Wax Remover Series

1. Instant Penetration, Rapid Dissolution: Formulated for high-temperature heavy wax. Using a unique “swelling-emulsification” mechanism, it rapidly penetrates solidified wax, causing it to disintegrate. Even stubbornly aged wax can be removed in 3-5 minutes with ultrasonics.

2. Substrate Safety (Anti-Corrosion): Critical for Zamak plating. The LQ-W series contains special corrosion inhibitors. While removing wax powerfully, it ensures zinc, aluminum, and copper substrates do not lose luster or suffer intergranular corrosion, preventing pitting in subsequent plating.

3. Long Bath Life: High-concentration formula with high wax tolerance. Even when the solution turns turbid, it maintains excellent cleaning efficiency, significantly extending bath replacement cycles and lowering costs.

Step 2: Micro-Level Cleaning – Hongyi Electrolytic Degreasing Series

After wax removal and soak cleaning, the surface may look clean, but a microscopic oil film and oxide layer remain. Electro-cleaning is the final guarantee for adhesion.

Technical Breakthroughs of Hongyi LQ-E Series

1. High Conductivity, Controlled Foam: The LQ-E series dissolves with excellent conductivity, generating dense bubbles (Hydrogen or Oxygen) on the workpiece surface. The scrubbing action of the gas “blasts” dirt out of micropores. The low-foam formula prevents tank overflow and short circuits.

2. Smut & Oxide Removal: For steel parts, our Anodic powder effectively oxidizes and removes surface smut. For Zinc alloys, our Cathodic powder activates the surface without damaging the finish.

3. Hard Water Chelation: Addressing the high water hardness in parts of Northern Vietnam, we add high-efficiency chelating agents to prevent Calcium and Magnesium ions from forming precipitates (scum) on the workpiece, eliminating “white haze” defects.

Customized Electroplating Pretreatment Solutions: By Material

We don’t just sell chemicals; we design SOPs:

• Plan A: Zinc/Aluminum Alloy (Sensitive Materials)

  • LQ-W Neutral Wax Remover (Ultrasonic) -> Mild Alkaline Soak Cleaner -> LQ-E Cathodic Electro-cleaning Powder -> Activation -> Plating.

  • Feature: Gentle, strictly prevents substrate corrosion.

• Plan B: Steel/Brass (Corrosion-Resistant Materials)

  • LQ-W Heavy Duty Wax Remover -> Strong Alkaline Soak Cleaner -> LQ-E Anodic Electro-cleaning Powder -> Acid Dip -> Plating.

  • Feature: Strongest cleaning power, superior adhesion.

Why Do Vietnam Platers Choose Hongyi?

1. Rapid Logistics: Plating lines cannot afford downtime. We stock ample inventory near Haiphong and Hanoi. When you urgently need chemicals, we deliver within 24 hours.

2. On-Site Titration Service: Controlling concentration in the electro-cleaning tank is vital. Hongyi’s engineers visit regularly with testing equipment to check concentration, pH, and temperature, training operators on precise dosing.

3. Troubleshooting Experts: Facing unexplained blistering? Our expert team uses Hull Cell Tests and cross-section analysis to quickly determine if the issue lies in pre-treatment or the brightener system.

Frequently Asked Questions (FAQ)

Q1: Why does my Zinc alloy turn black after electro-cleaning?

A: This is usually due to excessive voltage, prolonged time, or using Anodic cleaning by mistake, causing the zinc substrate to dissolve. We recommend Hongyi LQ-E specialized Cathodic powder and strict parameter control (3-5V, 30-60 seconds).

Q2: Does LQ-W Wax Remover require heating?

A: Yes. To achieve optimal efficiency, especially for high-melting-point polishing waxes, we recommend maintaining the ultrasonic tank temperature between 60-75°C.

Q3: Will your electrolytic powder create excessive foam?

A: No. The LQ-E series uses low-foam surfactants. The foam layer just covers the liquid surface to suppress alkaline mist (protecting worker health) without overflowing the tank.

Looking to Improve Your Yield Rate of Electroplating Pretreatment?

Contact the Hongyi Engineering Team today for free samples and a bath analysis report.

• Zalo/ Hotline: 0827 626 966
• Address: Nhà Xưởng F.A3, lô CN3-03, Khu phi thuế quan và KCN Nam Đình Vũ (khu 1), thuộc Khu Kinh tế Đình Vũ – Cát Hải, Phường Đông Hải 2, Quận Hải An, Thành phố Hải Phòng, Việt Nam