Ritman

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RITMAN is a service-oriented manufacturing enterprise with over four decades of experience in coating technology，providing one-stop customized solutions covering process planning, equipment manufacturing, and full-cycle operation and maintenance.

Bottom Dross & Top Dross | Cost-Saving Guide for Batch HDG LinesTo cut galvanizing production costs, manufacturers must ...
16/08/2026

Bottom Dross & Top Dross | Cost-Saving Guide for Batch HDG Lines
To cut galvanizing production costs, manufacturers must first understand zinc dross formation.
Ⅰ、How Zinc Dross Forms
Bottom and top dross are iron-zinc intermetallic compounds. At 450°C molten zinc bath, iron’s saturation solubility is only 0.035% by mass. Excess iron from workpieces, kettle corrosion or flux solution reacts with zinc to form FeZn₁₃ fine crystals, the source of all dross.
Ⅱ、 Bottom Dross
Composed of ζ & δ phase Fe-Zn alloys, it sinks to the kettle bottom due to higher density. If accumulated over 100 mm, it triggers local overheating, shortens kettle service life and causes granular coating defects.
Ⅲ、Top Dross
Iron bonds preferentially with aluminum to form Fe₂Al₅ (density: 4.2 g/cm³) that floats on bath surface.
0.135% Al by mass is the critical threshold:
Al＞0.135% generates lightweight Fe-Al-Zn floating dross, sticking to workpieces and causing pitting & rough coatings.
Ⅳ、RITMAN Dross & Cost Control Solutions
1. Limit iron contamination
Keep ferrous ions in flux solution below 1g/L. By weight, every 1 part iron consumes 25 parts zinc to generate dross.
2. Precise aluminum adjustment
Maintain aluminum at 0.005%–0.02% for standard batch HDG workpieces for bright coatings and less top dross.
*Note: This range applies only to batch galvanizing lines, not continuous strip HDG.
3. Stabilize zinc bath temperature
Temperature swings reduce iron solubility and accelerate massive top dross generation.
4. Regular bath purification
Adopt RITMAN zinc bath analyzers to monitor alloy elements continuously; use our dedicated purifiers to remove fine suspended dross particles.
RITMAN delivers all-in-one process optimization focusing on digital intelligence and green low-carbon development, enabling batch HDG plants to cut zinc dross and lower zinc consumption.
🌐 www.ritmangalvanizing.com

15/08/2026

Facing challenges in pretreatment of complex automotive components?

Complex automotive parts require more than effective pickling and phosphating. They require precise process control, consistent surface quality, and reliable preparation for subsequent coating.

With RITMAN’s intelligent pretreatment solutions, manufacturers can achieve:

🔹 Full-Process Digital Control — Digitalized management and monitoring throughout the entire pretreatment process
🔹 Optimized for Subsequent Painting Processes — Designed to provide a reliable surface condition for downstream painting and coating
🔹 Intelligent Process Management — Reduce manual intervention and improve production consistency
🔹 Data Traceability — Key process data can be monitored, analyzed, and traced for continuous optimization

From pickling and phosphating to subsequent painting, RITMAN helps automotive manufacturers build a more intelligent, precise, and reliable pretreatment process.

🌐 www.ritmangalvanizing.com

14/08/2026

Another RITMAN project is officially up and running.

From the first design discussions to production on the factory floor, every step has been about bringing the right process, equipment, and technology together.

Now, the galvanizing line in Liaoning, China is officially in operation.

Another project completed.

Another production line running.

And another partnership moving forward.🤝

We're proud to see another RITMAN solution now running on the factory floor.

🌐 www.ritmangalvanizing.com

13/08/2026

Building Trust Through Technology | Vietnam Customer Visit

We were pleased to welcome our customers from Vietnam to RITMAN for an in-depth visit and technical exchange.

From exploring our galvanizing equipment and production capabilities to discussing project requirements and industry development, every conversation brought us closer to understanding how intelligent galvanizing solutions can create greater value for customers.

For RITMAN, every customer visit is more than a meeting — it is an opportunity to exchange expertise, strengthen trust, and build long-term partnerships.

🌏We look forward to creating more possibilities together with our partners in Vietnam and across Southeast Asia.

🔗 Learn more about RITMAN: www.ritmangalvanizing.com

10/08/2026

It was a great privilege for the RITMAN team to attend the SMM Qingdao Galvanizing Conference!

We had fantastic opportunities to communicate with industry experts, share cutting-edge updates, and explore new trends and innovative solutions for modern hot-dip galvanizing production.

Striving To Be The Most Trusted Partner in Coating Technology, RITMAN keeps empowering global customers with intelligent, high-efficiency and eco-friendly galvanizing solutions for stable quality control and sustainable growth.

Learn more about our advanced galvanizing solutions:
🌐 www.ritmangalvanizing.com

Why do steel pipes still have rust spots after pickling?Many galvanizing plants face the same problem:✅ Clean outside su...
07/08/2026

Why do steel pipes still have rust spots after pickling?

Many galvanizing plants face the same problem:
✅ Clean outside surface
❌ Rust remains inside the pipe

The reason? Internal pickling is not as simple as it looks.

3 hidden causes behind incomplete pipe pickling:

🔹 1. Air trapped inside the pipe
Wrong dipping angles can create air pockets, preventing acid from reaching the inner surface.

🔹 2. Poor liquid circulation
Ferrous salts and acid residues can stick to the pipe wall, creating a barrier that stops the reaction.

🔹 3. No visual inspection inside pipes
The outside looks clean, but internal rust may remain unnoticed.

How to solve it?

✔ Add proper vent & drain holes for hollow structures
✔ Keep 30°–45° dipping angles during pickling
✔ Move pipes during acid treatment to improve circulation
✔ Use two-stage rinsing to remove acid residues
✔ Apply proper flux treatment before galvanizing

The result?

✨ Cleaner inner surfaces
✨ More uniform zinc coating
✨ Higher galvanizing quality and reliability

Good galvanizing starts before the zinc bath.
🌐 www.ritmangalvanizing.com

Recently, the China National Intellectual Property Administration (CNIPA) officially released the evaluation results of ...
04/08/2026

Recently, the China National Intellectual Property Administration (CNIPA) officially released the evaluation results of the 26th China Patent Awards. RITMAN has been honored with the China Patent Excellence Award for its core invention patent——A Closed-Loop Hot-Dip Galvanizing Production Line and Its Control Method. This is a prestigious national award in China’s intellectual property field.

Supported by the core technology of this patent, RITMAN realizes full-process control starting from the source of production. The technology greatly reduces the adverse impact of iron impurities on coating formation, achieving simultaneous triple upgrades: uniform coating thickness, superior surface finish and long-lasting anti-corrosion performance. It empowers customers to capture a larger share of the high-end market with stable and reliable product quality. This honor fully proves RITMAN’s independent original technical strength and capability of industrializing innovative achievements in the intelligent hot-dip galvanizing industry.

Going forward, RITMAN will keep customer value at the heart of everything it does. The company will continue to advance cutting-edge coating technologies, expand its lifecycle services, and bring more proprietary innovations to market. Through these efforts, RITMAN helps customers reduce costs, improve efficiency, meet regulatory requirements, and strengthen their competitive edge. Together with partners around the world, RITMAN is committed to driving sustainable industrial transformation and creating long-term value.
🌐 www.ritmangalvanizing.com

28/07/2026

RITMAN Launches Global Customer Service Center
On July 24, RITMAN held the inauguration ceremony of its Global Customer Service Center in Xuzhou, marking a key milestone in our global service strategy.
Backed by our comprehensive coating technology solutions, RITMAN has deployed over 500 production lines across Asia, Europe, Africa and South America. As our overseas business expands rapidly, the new center is built to deliver full-lifecycle professional support for all global clients with seven core service functions.
This launch follows our brand upgrade with the core value "Innovate Technology, Serve the World". Our team will prioritize long-term customer value, act as reliable strategic partners, and strive to become the most trusted coating technology partner worldwide.
Moving forward, we will leverage this global service hub to provide one-stop integrated services, boost our global layout, and drive high-quality international growth.
🌐 www.ritmangalvanizing.com

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