General galvanizing (HDG)

Sustainable Passivations and Additives for Hot-Dip Galvanizing (HDG)

AD Chemicals offers a comprehensive product range of chromium(VI)-free passivations and process additives for the hot-dip galvanizing (HDG) industry and pre-treatment prior to coating (DUPLEX systems). These solutions are engineered to meet stringent industry requirements and support both functional and aesthetic performance.

Post-Galvanizing Passivation

Our chromium-free passivation products are suitable for direct application in the quench or cooling bath, forming a uniform protective layer on galvanized surfaces. These treatments enhance corrosion resistance and are sustainable, cost-efficient, and fully compliant with international standards such as Qualisteelcoat and GSB. AD Chemicals also offers customized passivation solutions tailored to specific substrates and process parameters.

Additives for Process Optimization

To improve bath efficiency and extend operational life, AD Chemicals provides a series of smart process additives, including:

• Degreasing agents

• Pickling and cleaning additives

• Inhibitors for bath stabilization

• Specialized formulations for zinc alloys

These additives support a more stable and efficient galvanizing process, ensuring consistent high-quality surface results.

Paint Strippers for Hot-Dip Galvanized Steel

AD Chemicals supplies a wide portfolio of paint strippers formulated to remove coatings and organic residues from galvanized surfaces. The range includes both cold (room temperature) and hot stripping products, as well as methylene chloride-free alternatives. Whether you’re looking for a traditional high-performance stripper or an environmentally friendly option, AD offers a reliable solution.

Technical Expertise and Tailored Solutions

With over 40 years of experience in surface treatment and a dedicated R&D team, AD Chemicals delivers customized solutions for every stage of your galvanizing or pre-treatment process. From lab-scale validation to full-scale production, we work closely with customers to optimize performance and meet industry demands.