In a significant stride towards more environmentally friendly coating technologies, researchers from Zhejiang Wuyuan Technology Co., Ltd. and Zhejiang Jingu Co., Ltd. have published a study in *Cailiao Baohu* (translated as *Materials Protection*) that explores the influence of calcium (Ca²⁺) and magnesium (Mg²⁺) ions on zinc-manganese phosphate coatings. This research is particularly relevant as the industry seeks alternatives to nickel-based phosphating processes, which are increasingly restricted due to environmental concerns.
The study, led by Lu Guojian and his team, investigates the potential of Ca²⁺ and Mg²⁺ as substitutes for nickel (Ni²⁺) in phosphating solutions used for cathodic electrophoresis. The findings reveal that Ca²⁺ refines the grain size of the phosphating film, while Mg²⁺ increases its thickness. When both ions are combined, they enhance the film’s resistance to dissolution during the electrophoretic painting process.
“This research opens up new possibilities for developing nickel-free phosphating solutions that are both effective and environmentally friendly,” said Lu Guojian, the lead author of the study. The team’s work demonstrates that the new zinc-manganese phosphating solution with added calcium and magnesium ions maintains stable and controllable ion concentrations, which is crucial for industrial applications.
The practical implications of this research are substantial. The resulting coatings, after phosphating electrophoresis, can withstand a neutral salt-spray test for 800 hours, meeting the industry standard for cathodic electrophoretic coatings with a single-sided extension of 2 mm or less. This durability is critical for applications in the energy sector, where corrosion resistance is paramount.
The study’s findings suggest that the new phosphating solution could become a viable alternative to traditional nickel-based processes, offering a more sustainable option without compromising performance. As the industry continues to prioritize environmental sustainability, this research could pave the way for broader adoption of nickel-free phosphating technologies.
“This is a significant step forward in the quest for greener coating technologies,” said one of the co-authors, SUN Shenglong. “The potential commercial impacts for the energy sector are substantial, as it allows for the development of more durable and environmentally friendly coatings.”
The research published in *Cailiao Baohu* not only highlights the technical advancements in phosphating technologies but also underscores the importance of innovation in addressing environmental challenges. As the industry moves towards more sustainable practices, this study provides a compelling case for the adoption of calcium and magnesium-based phosphating solutions.
The findings of this study could shape future developments in the field, encouraging further research into alternative ions and their potential applications in coating technologies. The commercial impacts for the energy sector are particularly noteworthy, as the demand for durable and environmentally friendly coatings continues to grow.
In conclusion, the research led by Lu Guojian and his team represents a significant advancement in the field of phosphating technologies. By exploring the use of Ca²⁺ and Mg²⁺ as substitutes for Ni²⁺, the study offers a promising alternative that is both effective and environmentally sustainable. The findings have the potential to influence future developments in the industry, particularly in the energy sector, where corrosion resistance and environmental sustainability are critical.