Copper Radiator Surface Treatment in Vietnam: The Complete Guide (Cleaning, Polishing & Anti-Tarnish)

Abstract: Addressing the high humidity challenges in Northern Vietnam (Hanoi, Haiphong, Bac Ninh), Hongyi New Materials provides a full-process solution for copper radiators. Featuring LQ-C600 flux remover, LQ-C601 chemical polish, and LQ-C105 long-term anti-tarnish protection to solve oxidation and residue issues.

Introduction: The Challenge of Protecting Copper in Vietnam’s Climate

As the “China Plus One” strategy accelerates, Northern Vietnam has become a global manufacturing hub for 3C electronics and automotive components. Among these precision parts, Copper Radiators are critical for thermal management systems due to their superior thermal conductivity.

However, Foreign Direct Investment (FDI) enterprises and local manufacturers in Vietnam face unique “tropical challenges” when processing copper:

1. Extreme Humidity: Average humidity in Northern Vietnam exceeds 80%, reaching saturation during the “Humid Season” (Nồm). Without effective protection, copper oxidizes rapidly (turning black or spotting) during workshop transfer or storage.

2. Welding Residues: Residual rosin (flux) and carbides from reflow or wave soldering, if not cleaned thoroughly, affect aesthetics and increase contact resistance, severely impacting thermal efficiency.

As a chemical expert deeply rooted in the local market, Hongyi New Materials understands these pain points and has developed a one-stop solution compliant with RoHS 2.0 environmental standards.

Core Process Flow: A Three-Step Solution

We don’t just sell chemicals; we design complete process flows. The following solution has been validated in major electronics factories across Bac Ninh and Haiphong.

Step 1: Precision Cleaning – Eliminating Rosin & Oil

Pain Point: Post-soldering rosin residues often solidify in the tight crevices of radiator fins. Traditional solvent cleaners are flammable and often fail to meet Vietnam’s Ministry of Natural Resources and Environment (MONRE) regulations.

Solution: LQ-C600 Water-based Rosin Cleaner

• Mechanism: LQ-C600 uses an advanced surfactant formula based on “saponification” principles. It rapidly penetrates high-density radiator fins to emulsify and strip away stubborn rosin and flux residues.

• Process Advantages:

  • Eco-Friendly: Halogen-free, low odor, non-flammable, significantly reducing workshop safety risks.

  • Substrate Protection: Contains corrosion inhibitors to clean powerfully without damaging the copper matrix, maintaining dimensional accuracy.

  • Recommendation: Use with ultrasonic cleaning tanks (50-60°C) to increase cleaning efficiency by over 50%.

Step 2: Surface Renewal – Activation & Chemical Polishing

Pain Point: Clients demand products that are not just “clean” but exhibit a premium metallic luster. Simple cleaning cannot remove the copper’s inherent oxide scale.

Solution: LQ-C802 Activator + LQ-C601 Copper Polish

• LQ-C802 Copper Activator: A critical pre-treatment step. A few seconds of immersion at room temperature removes old oxide scales and inorganic impurities, revealing a fresh, highly active metal surface.

• LQ-C601 Copper Polish: The secret weapon for adding value. It chemically levels the surface, transforming matte radiators into a mirror-like finish. Unlike mechanical polishing, chemical polishing reaches all areas, making it ideal for complex radiator modules.

Step 3: Ultimate Protection – Resisting Humidity & Sea Freight Corrosion

Pain Point: Products face weeks of high-salt, high-humidity exposure while waiting at Haiphong Port or during ocean freight to Europe/USA.

Solution: LQ-C105 Protectant (Anti-Tarnish Agent)

• Core Technology: LQ-C105 utilizes nano-self-assembly technology to form a dense, transparent molecular protective film on the copper surface.

• Key Performance:

  • Salt Spray Resistance: SGS tested. Treated copper parts pass Neutral Salt Spray (NSS) tests for 48-72 hours without oxidation, fully meeting export standards.

  • No Impact on Conductivity: The film is nano-scale thin, ensuring no interference with heat exchange efficiency or contact resistance—the most critical metric for electronic radiators.

Why Choose Hongyi New Materials as Your Partner in Vietnam?

In the B2B supply chain, stability is everything. Choosing Hongyi means choosing localized security.

1. Rapid Local Delivery: We set up chemical factory in Haiphong, delivering Hanoi quicky. Unlike the 2-3 week customs clearance cycle required for importing from China, we promise 24-48 hour delivery to your factory, helping you achieve “Zero Inventory” management.

2. Compliance & Certification: All products come with complete MSDS, TDS, and third-party RoHS/REACH test reports. We help you easily pass ISO system audits and factory inspections from end-clients like Apple or Samsung.

3. On-Site Technical Support: Our technical engineers are based in Vietnam and speak Chinese/Vietnamese. If your production line experiences yield fluctuations, we can bring instruments to your site immediately for bath analysis and process debugging.

Frequently Asked Questions (FAQ)

Q1: Do I need to replace my existing cleaning equipment to use LQ-C600?

A: No. LQ-C600 is compatible with most existing ultrasonic or spray cleaning lines. Our engineers will assist in adjusting concentration and temperature settings based on your specific equipment.

Q2: Can products treated with LQ-C105 protectant be soldered directly?

A: Yes. The organic film of LQ-C105 decomposes and volatilizes rapidly at soldering temperatures, without affecting solder wetting or joint strength.

Q3: Do you offer sample testing?

A: Absolutely. We welcome clients in Northern Vietnam to contact us. We can send free samples, or you can send your workpieces to our lab, where we will perform free trials and provide a test report.

Looking to Improve Your Yield Rate?

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