2–4 µm hopeite crystal
20–30% better cross-hatch adhesion vs. standard zinc phosphate
Phosphating · Process-engineered chemistry
UNIKOAT ZN-NIZinc-Nickel Phosphate
Superior Electrocoat Adhesion for Automotive OEM Lines
Zn-Ni Hopeite2–4 µm CrystalCED/KTL ReadyOEM Premium
01 / Product brief
Superior Electrocoat Adhesion for Automotive OEM Lines
Premium zinc phosphating with nickel and manganese accelerators producing a hopeite-dominant crystal structure at 40–55°C. Nickel ions suppress phosphophyllite formation and refine crystal morphology to 2–4 µm, delivering superior adhesion and corrosion resistance under CED/KTL electrocoat versus standard zinc chemistry.
Nickel-accelerated chemistry produces hopeite-dominant crystal that is proven to achieve 20–30% better cross-hatch adhesion in electrocoat pull-off tests versus standard zinc phosphate. The preferred chemistry for Indian OEM supply chains using CED paint systems.
02 / Performance
Key process advantages
Product-specific outcomes for production quality, operating control and line performance.
CED/KTL optimised
Proven chemistry for Indian automotive electrocoat systems
OEM audit ready
Meets Tata, Mahindra, TVS, and Bajaj pre-treatment specifications
04 / Process position
Where it works in the line
Applied at Stage 5 (Phosphate) in a 7–9 stage automotive pre-treatment line — nickel-accelerated chemistry produces hopeite crystal structure optimised for CED/KTL adhesion.
- 01
Degrease
Process stage
- 02
Rinse
Process stage
- 03
De-rust
Process stage
- 04
Rinse
Process stage
- 05
Condition
Process stage
- 06
Phosphate
Applied at Stage 5 (Phosphate) in a 7–9 stage automotive pre-treatment line — nickel-accelerated chemistry produces hopeite crystal structure optimised for CED/KTL adhesion.
- 07
Passivate
Process stage
- 08
Rinse
Process stage
- 09
Dry
Process stage
05 / Applications
Specified for real production demands
Typical applications and substrate conditions for UNIKOAT ZN-NI.
Automotive body-in-white parts destined for CED/KTL electrocoat
- Steel
Two-wheeler frames and fuel tanks with OEM electrocoat specifications
- Galvanised Substrates
Tier-1 stamped components requiring fine crystal for adhesion audits
- Automotive Body Parts
Commercial vehicle cab and chassis panels before primer-surfacer
- Electrocoat Lines
Technical support
Validate UNIKOAT ZN-NI on your line.
Share your substrate, current bath, throughput and finishing system. Our process team will recommend a practical trial window.