Zinc Phosphate and Aluminum Tripolyphosphate for Water-Based Coatings
Water-based coatings are increasingly used in industrial protective coating systems because they support lower-VOC formulation directions while maintaining practical coating performance for metal protection. For coating manufacturers, developing a stable water-based anti-corrosion coating is not only a matter of replacing solvent with water. It also requires careful selection of pigments, binders, dispersants, fillers, and additives that can work together in a waterborne system.
In this water-based coating application, the customer required suitable phosphate-based anti-corrosion pigments that could support corrosion protection, water resistance, color flexibility, compatibility with multiple coating systems, and stable storage performance.
Based on the application requirements, Shijiazhuang City Xinsheng Chemical Co., Ltd. recommended Zinc Phosphate products including ZPM, ZPH, and ZPE, as well as Aluminum Tripolyphosphate products including MY-2, MY-SL, APW-1, and APW-2.
These products were selected for water-based anti-rust coating systems where environmental compliance, formulation stability, and protective coating performance were important.
Project Background
Water-based industrial coatings are widely used for metal structures, machinery parts, equipment surfaces, steel components, and other substrates requiring anti-corrosion protection. Compared with traditional solvent-based systems, water-based coatings often place higher requirements on pigment compatibility, dispersion stability, storage stability, and formulation balance.
In a waterborne coating system, the anti-corrosion pigment must remain stable in the formulation and should not negatively affect color adjustment, film formation, adhesion, or long-term protective performance. For manufacturers producing water-based anti-rust coatings, selecting the right phosphate pigment is an important step in achieving reliable coating quality.
For this case, the customer needed phosphate-based anti-corrosion pigments suitable for water-based coating applications. Xinsheng Chemical recommended Zinc Phosphate and Aluminum Tripolyphosphate products that could support water resistance, corrosion resistance, weather resistance, and storage stability.
Customer Challenge
The customer’s main challenge was to develop or optimize a water-based coating system that could provide effective anti-corrosion protection while maintaining good formulation stability and application performance.
Water-based coatings can be more sensitive to pigment selection than solvent-based coatings. If the pigment is not compatible with the waterborne system, it may cause dispersion problems, poor storage stability, color instability, reduced coating performance, or decreased film quality.
The customer also needed a pigment solution that allowed flexible color formulation. Because Zinc Phosphate has a relatively low refractive index and good transparency, it can be useful in coating systems where color adjustment is required. This is important for coating manufacturers producing different industrial coating colors according to customer requirements.
The main challenges included:
Supporting anti-corrosion performance in water-based coatings
Improving water resistance
Maintaining good storage stability
Supporting compatibility with multiple coating systems
Allowing flexible color formulation
Maintaining weather resistance
Replacing traditional toxic anti-rust pigments in suitable formulations
Supporting environmentally friendly coating development
Recommended Solution
Xinsheng Chemical recommended a phosphate-based pigment solution using Zinc Phosphate and Aluminum Tripolyphosphate products.
Zinc Phosphate ZPM, ZPH, and ZPE were recommended for water-based anti-rust coating systems. These Zinc Phosphate products are suitable for preparing various anti-corrosion coatings and can support good stability in water-based formulations. Their high transparency and low refractive index help make color adjustment easier, allowing the coating manufacturer to combine them with other pigments for different coating colors.
Aluminum Tripolyphosphate MY-2, MY-SL, APW-1, and APW-2 were recommended as inorganic fine chemical anti-rust pigment options for water-based coatings. These products can support storage stability, weather resistance, and anti-corrosion performance. They are suitable for environmentally oriented coating systems and industrial protective coating formulations.
The recommended solution was suitable for:
Water-based anti-rust coatings
Water-based industrial protective coatings
Metal protection coatings
Environmentally friendly coating systems
Coatings requiring flexible color formulation
Coatings requiring storage stability and weather resistance
Formulations seeking alternatives to traditional toxic anti-rust pigments
Product Supplied
The products supplied for this water-based coating application included the following:
Zinc Phosphate ZPM
ZPM was selected as a Zinc Phosphate grade for water-based anti-corrosion coating systems. It is suitable for formulations requiring water resistance, corrosion resistance, compatibility, and color flexibility.
Zinc Phosphate ZPH
ZPH was recommended for water-based anti-rust coating applications where formulation stability and protective performance were important.
Zinc Phosphate ZPE
ZPE was used as another Zinc Phosphate option for water-based coating systems requiring stable performance, good affinity with coating materials, and reliable anti-corrosion function.
Aluminum Tripolyphosphate MY-2
MY-2 was selected as an Aluminum Tripolyphosphate product suitable for water-based anti-rust coatings and environmentally friendly protective coatings.
Aluminum Tripolyphosphate MY-SL
MY-SL was recommended for water-based coating applications where storage stability, weather resistance, and corrosion protection were important.
Aluminum Tripolyphosphate APW-1
APW-1 was used as a phosphate-based anti-corrosion pigment for waterborne coating systems requiring stable performance and practical formulation compatibility.
Aluminum Tripolyphosphate APW-2
APW-2 was supplied as another water-based coating grade suitable for anti-rust coating systems and industrial protective coating applications.
Together, these Zinc Phosphate and Aluminum Tripolyphosphate products provided the customer with multiple pigment options for different water-based coating formulation needs.
Application Process
In the customer’s application, Zinc Phosphate and Aluminum Tripolyphosphate products were incorporated into water-based coating formulations according to the customer’s internal production process and formulation design.
A typical water-based coating development process may include binder selection, pigment and filler selection, wetting and dispersion, grinding, pH adjustment, let-down, viscosity control, defoaming, application testing, drying evaluation, corrosion resistance testing, and storage stability observation.
For water-based anti-corrosion coatings, pigment dispersion and compatibility are especially important. The pigment must be well dispersed in the waterborne system and should remain stable during storage. It must also work together with the resin system and other additives to form a coating film with reliable anti-corrosion performance.
In this case, Zinc Phosphate products were used to support water resistance, corrosion resistance, color flexibility, coating compatibility, and storage stability. Aluminum Tripolyphosphate products were used to support environmentally friendly anti-rust performance, weather resistance, and long-term coating stability.
Because the original case information does not provide exact dosage, formulation ratio, resin type, substrate type, pH value, coating thickness, salt spray test data, or customer test results, these values should not be added to the website unless confirmed by the customer or Xinsheng Chemical.
Results and Benefits
The phosphate-based pigment solution was designed to support several important benefits for water-based coating applications.
First, Zinc Phosphate products helped support anti-corrosion performance in water-based anti-rust coatings. For metal protection, this is one of the most important functions of the pigment system.
Second, the coating formulation could maintain good water resistance. Water resistance is essential for water-based protective coatings because the coating film must resist moisture and help protect the metal substrate from corrosion.
Third, Zinc Phosphate products supported flexible color formulation. Because of their relatively low refractive index and high transparency, these materials can be used together with other pigments, making it easier for coating manufacturers to prepare different colors.
Fourth, the recommended pigments showed good affinity with multiple coating materials. This helped the customer build a more stable formulation system and reduce compatibility concerns during coating development.
Fifth, Aluminum Tripolyphosphate products supported storage stability and weather resistance. These properties are important because water-based coatings must remain stable before use and maintain protective performance after application.
Sixth, the solution supported an environmentally friendly anti-rust coating direction. Aluminum Tripolyphosphate can be used as an inorganic anti-rust pigment option in coating systems seeking alternatives to traditional toxic pigments such as red lead and zinc chrome yellow.
Overall, the Zinc Phosphate and Aluminum Tripolyphosphate solution helped the customer develop a more reliable water-based anti-corrosion coating system with better balance among protection, stability, color flexibility, and environmental direction.
Why the Customer Chose Xinsheng Chemical
The customer chose Xinsheng Chemical because the company could provide multiple phosphate-based pigment grades suitable for water-based coating applications. Waterborne coating systems often require more precise pigment selection than conventional solvent-based systems, and the availability of different Zinc Phosphate and Aluminum Tripolyphosphate grades allowed the customer to choose suitable options according to formulation requirements.
Xinsheng Chemical’s product recommendation matched the customer’s need for anti-corrosion performance, water resistance, coating compatibility, storage stability, weather resistance, and color flexibility.
For coating manufacturers, a reliable pigment supplier should provide not only products, but also an application-oriented selection direction. In this case, Xinsheng Chemical provided a practical phosphate pigment solution for water-based industrial coatings and environmentally friendly anti-rust coatings.
Conclusion
This water-based coating case demonstrates how Zinc Phosphate and Aluminum Tripolyphosphate products can be used as anti-corrosion pigment solutions in waterborne protective coating systems.
For manufacturers developing water-based anti-rust coatings, environmentally friendly industrial coatings, and metal protection systems, these phosphate pigments can help support corrosion resistance, water resistance, storage stability, weather resistance, coating compatibility, and flexible color formulation.
By recommending suitable Zinc Phosphate and Aluminum Tripolyphosphate grades for this application, Xinsheng Chemical provided the customer with a practical material solution for water-based industrial anti-corrosion coatings.