Development trend of environmentally friendly surface treatment technology in 2025: dual wheel drive of material innovation and process upgrading

Against the backdrop of the global "dual carbon" goals and increasingly strict environmental regulations, the surface treatment industry is undergoing a deep transformation from "compliance and standards" to "green efficiency". The problems of high energy consumption, high pollution, and resource waste in traditional surface treatment processes have become the core bottlenecks restricting the sustainable development of the industry. And environmentally friendly surface treatment technology, through material innovation, process optimization, resource recycling and other paths, can not only solve environmental problems, but also provide core support for enterprises to reduce comprehensive costs and explore high-end markets. As a company that has been deeply involved in the field of surface treatment materials for nearly 20 years, Dongguan Bont Surface Treatment Materials Co., Ltd（bont.cn） Combining industry practice and technological research and development experience, deeply analyze the core trends and implementation paths of environmentally friendly surface treatment technology in 2025.

1、 Material Innovation: Environmentally friendly Surface Treatment Materials Become the Mainstream Direction

1. Comprehensive replacement of traditional products with phosphorus free and heavy metal free conversion film materials

Traditional phosphating and passivation processes are prone to eutrophication of water bodies and soil pollution due to harmful substances such as phosphorus, nickel, and chromium, and have been included in the restricted use list by many countries. By 2025, phosphorus free conversion film materials will become a standard in the industry, and their core technological paths include:

Silane/Titane Coupling Agent System: Used through molecular bonding to form a dense protective film on the surface of the substrate, with salt spray resistance of up to 800-1200 hours. It is suitable for multiple materials such as steel and aluminum alloys and has been widely used in fields such as automotive components and electronic device casings;

Zirconium/hafnium based conversion agent: does not contain phosphorus or heavy metals, has a fast film formation rate (30-60 seconds), strong stability of the tank solution, extends the service life by more than 50% compared to traditional phosphating solutions, and can reduce waste liquid treatment costs by 40%.

The BT-600 phosphorus free conversion agent independently developed by Bont enhances the adhesion of the film layer through composite complexation technology. It has passed the supply chain certification of leading enterprises such as Huawei and BYD, helping customers achieve "zero phosphorus emissions" compliance upgrade.

2. The rise of water-based and bio based surface treatment additives

Solvent based surface treatment additives are gradually being replaced by water-based and bio based products due to excessive VOC emissions. The market size in this field is expected to exceed 30 billion yuan by 2025

Water based degreaser: using biodegradable surfactants, the emulsifying power of mineral oil and animal and vegetable oil is increased by 30%. The tank solution can be recycled for 8-12 months, reducing VOCs emissions by 90% compared to traditional solvent based degreasers;

Biobased paint remover: with plant extracts as the core component, replacing toxic solvents such as dichloromethane and phenol, the paint removal efficiency is 1.5 times that of traditional products, and it is non corrosive to the substrate. It is suitable for rework of precision electronic components and aerospace parts;

High solid content coating auxiliary: Develop specialized wetting and dispersing agents and leveling agents for water-based and powder coatings based on their application characteristics, to solve pain points such as insufficient adhesion and sagging of water-based coatings, and promote the environmental protection of the entire coating process chain.

3. Upgrade of functional and environmentally friendly coating materials

Environmentally friendly surface treatment materials are developing from "single environmental protection" to "environmental protection+functionality" composite direction:

Corrosion resistant and wear-resistant integrated coating: By incorporating ceramic particles, graphene and other materials into environmentally friendly coatings through nano modification technology, the coating's salt spray resistance exceeds 2000 hours, and its hardness is increased to HRC 60 or above, making it suitable for harsh scenarios such as marine engineering and construction machinery;

Low surface energy environmentally friendly coating: using fluorine modified acrylic resin to achieve the dual function of "hydrophobic and oleophobic", which can reduce the frequency of cleaning during product use and lower operation and maintenance costs. It has been applied in fields such as household appliances and food machinery;

Antibacterial and environmentally friendly coating: natural antibacterial ingredients such as silver ions and zinc ions are added to achieve a 99% inhibition rate on microorganisms such as Escherichia coli and Staphylococcus aureus while meeting environmental standards, which meets the surface treatment needs of medical and maternal products.

2、 Process Upgrade: Collaborative Development of Greening, Efficiency, and Intelligence

1. Chromium free and low-temperature chemical process optimization core

Chromium free passivation process: replacing traditional hexavalent chromium passivation, using trivalent chromium, zirconium titanium composite passivation and other technologies to form a protective film on the surface of aluminum alloys and galvanized parts, meeting international standards such as RoHS and REACH of the European Union, and has become a mandatory requirement in the automotive and electronics industries;

Low temperature treatment process: Through catalyst improvement, the temperature of traditional surface treatment process is reduced from 80-100 ℃ to 30-50 ℃, energy consumption is reduced by more than 60%, and the evaporation loss of tank solution is reduced, extending the service life and adapting to small and medium-sized enterprises with high energy conservation and emission reduction needs;

Short process technology: integrating multiple steps of "degreasing pickling conversion passivation", developing a "one-step" environmental protection treatment process, reducing the number of processes by 30%, shortening the production cycle, and reducing water resource consumption. The annual water saving of a single production line can reach over 1000 tons.

2. Large scale application of resource recycling technology

Turning waste into treasure "has become an important development direction for environmentally friendly surface treatment technology, and resource recycling has changed from" optional "to" mandatory ":

Precious metal recycling technology: using a combination of "chemical precipitation+ion exchange+electrolytic refining" process, the recovery rate of precious metals such as gold, palladium, silver, etc. in electroplating waste liquid is ≥ 99%, with a purity of 99.99%. After application, a PCB enterprise has increased its annual income by over 8 million yuan;

Wastewater recycling treatment system: Through membrane separation, reverse osmosis and other technologies, the surface treatment of wastewater is achieved through "graded treatment and recycling", with a recycling rate of over 85%, significantly reducing fresh water consumption and wastewater discharge costs;

Resource utilization of waste residue: The waste residue generated from surface treatment (such as phosphating residue and paint stripping residue) is extracted through high-temperature roasting, acid dissolution recovery and other processes to extract useful components for the preparation of building materials or secondary processing raw materials, achieving zero landfill of solid waste.

3. Intelligent technology empowers green production

The deep integration of intelligence and environmental protection has become an important trend in the surface treatment industry by 2025

Intelligent tank liquid management system: Real time monitoring of tank liquid concentration, pH value, temperature and other parameters through sensors, combined with AI algorithms to automatically replenish chemicals, avoiding waste and pollution caused by tank liquid imbalance, and reducing chemical consumption by 20%;

Digital environmental monitoring platform: Real time monitoring of VOCs, wastewater discharge, energy consumption and other data, automatic generation of environmental compliance reports, early warning of over standard risks, and helping enterprises accurately control environmental costs;

Automated surface treatment production line: using robots to replace manual operation, achieving closed operation, reducing the risk of pollutant volatilization and personnel contact, while improving process stability, and increasing product yield from 95% to over 99%.

3、 Industry application: Implementation scenarios of environmental protection technology in segmented fields

1. Electronic and electrical industry: High precision+low pollution parallel

Electronic and electrical products require extremely high levels of "environmental friendliness+precision" in surface treatment, with phosphorus free conversion, water-based coating, and low-temperature processes becoming mainstream choices. The BT-300 water-based degreaser+BT-600 phosphorus free conversion agent combination solution customized by Bonte for consumer electronics customers achieves a 90% reduction in VOCs emissions while meeting the high adhesion and insulation requirements of electronic components. It has been applied in mass production of products such as mobile phone cases and PCB boards.

2. Automotive industry: Green supply chain drives technological upgrades

The audit of "green supply chain" in the automotive industry is becoming increasingly strict, and the environmental requirements of component suppliers by OEMs are extended to the surface treatment process. Chromium free passivation, powder coating, and precious metal recycling technologies have become the preferred choices for automotive companies. After introducing Bont's environmentally friendly surface treatment solution, a certain automotive parts manufacturer has reduced wastewater treatment costs by 40% and successfully passed environmental certifications from Tesla, Volkswagen, and other car companies.

3. Aerospace industry: Balancing high performance and environmental friendliness

Aerospace components have strict requirements for corrosion resistance, wear resistance, and high temperature resistance in surface treatment, and traditional processes are difficult to balance "performance" and "environmental protection". By 2025, ceramic based environmentally friendly coatings and low-temperature plasma treatment technology will gradually be promoted, achieving zero emissions of harmful substances while meeting the extreme working conditions of components, and promoting the green transformation of the aerospace industry.

4、 Industry challenges and breakthrough directions

The current implementation of environmentally friendly surface treatment technology still faces three major challenges: firstly, the cost of some environmentally friendly materials is 10% -20% higher than traditional products, and the acceptance of small and medium-sized enterprises needs to be improved; Secondly, the technical standards are not yet unified, and the compatibility of environmental protection processes among different enterprises is insufficient; Thirdly, there is a shortage of professional and technical talents, which hinders the promotion and application of advanced technologies.

The breakthrough path mainly includes: reducing costs through technological research and development, and lowering the cost of environmentally friendly materials through large-scale production and formula optimization; Industry collaboration to develop standards and promote the standardization of environmental protection technology parameters and testing methods; Integrating industry, academia, and research to cultivate talents, enterprises cooperate with universities and research institutions to establish training bases and cultivate compound technical talents.

As an industry participant, Bonte has collaborated with South China University of Technology and Dongguan University of Technology through the "Guangdong Province Surface Treatment Materials Engineering Technology Research Center" platform to develop more than 10 cost-effective and environmentally friendly surface treatment materials, and has applied for more than 20 invention patents, helping small and medium-sized enterprises achieve "high environmental protection" upgrades at "low cost".

5、 Future Outlook: From "Green Compliance" to "Value Creation"

In 2025 and beyond, environmentally friendly surface treatment technology will shift from "passive compliance" to "active value creation", presenting three major development directions: first, material innovation will evolve towards "multifunctional composite", achieving deep unity of environmental protection, functionality, and economy; The second is the development of process upgrading towards a "full process closed-loop" approach, which involves greening the entire chain from raw material procurement to waste recycling; The third is the acceleration of industry development towards "cross-border integration", where surface treatment technology is deeply integrated with new energy, new materials, and digital technologies, giving rise to more innovative application scenarios.

Dongguan Bonte Surface Treatment Materials Co., Ltd. has always taken "technological innovation drives green development" as its mission, continuously deepening the research and development of environmentally friendly surface treatment materials and process optimization, and has formed a full range of environmental protection solutions such as phosphorus free conversion agents, water-based paint removers, and precious metal recycling systems. In the future, Bont will continue to focus on customer needs, promote the industrialization of environmental protection technology, and work with industry partners to build a green ecosystem for the surface treatment industry.

For more information on environmentally friendly surface treatment technologies or customized solutions, please visit the official website bont.cn.