Application-specific chemistry
Formulations designed around your substrate, water quality, paint system and production conditions.
Macro CoatsOur approach
Engineered for performance
We combine engineering, chemistry and process understanding to deliver measurable improvements on the shop floor.
Each programme starts from the line: the substrate, the water, the paint system and the production conditions it has to work within.
Low-temperature processing
Zinc phosphating effective at 45–55 °C. Lower energy consumption and better operating economics.
Chromium-free technologies
Environmentally responsible passivation for a safer workplace and a sustainable future.
Automation-ready processes
Automatic dosing systems, online pH monitoring and process control for consistent quality.
Reliable surface preparation
Stable bath performance: lower sludge, longer bath life, consistent coating weight and fewer rejections.
Technical application support
On-site support, process optimisation, training and continuous improvement through a long-term partnership.
Surface preparation isn’t another process step. It’s the foundation of every durable finish.
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Macro CoatsProblem → solution
Solving real manufacturing challenges
We go beyond the visible problem to engineer the right solution.
Typical pretreatment sequence
01Degrease
02Rinse
03De-rust
04Phosphate
05Passivate
06Protect
No.ChallengeMacro Coats solutionProduct line
01Oil and grease contaminationIndustrial cleaners and degreasers prepare a clean surface for pretreatment.Cleaners · Degreasers
02Poor coating adhesionFine-crystal zinc phosphating for superior paint adhesion.Zinc phosphating
03Surface rust and corrosionChromium-free passivation and rust preventive oils for corrosion resistance, including against flash rust.Passivation · Rust preventive oils
04Scale and oxidationDe-rusting solutions return parts to clean metal before conversion coating.De-rusting solutions
05Inconsistent pretreatmentAutomatic dosing and online pH control for consistent coating quality.Dosing & pH control support
06High operating temperaturesLow-temperature process at 45–55 °C for reduced energy cost.Low-temp zinc phosphating
07Chemical process controlOptimised bath chemistry: lower sludge, longer bath life and fewer changeovers.Process additives
We don’t treat symptoms. We engineer the process behind them.
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Macro CoatsProduct portfolio
Complete industrial chemical solutions
A comprehensive range of chemicals and solutions for every stage of your surface treatment process.
0103 lines
Surface preparation
CleanersDegreasersDe-rusting Solutions
0203 lines
Conversion coatings
Low-Temperature Zinc PhosphatingIron PhosphatingManganese Phosphating
0303 lines
Passivation & rust prevention
Chromium-Free PassivationRust Preventive OilsSealers
0404 lines
Specialty process chemicals
Paint Booth ChemicalsWater TreatmentProcess AdditivesCustom Formulations
Full product profiles in the MacroCoats product portfolio04
Macro CoatsOur clients
Trusted by leading manufacturers
Supplied to manufacturers across automotive, railways, engineering and industrial production.
Macro Coats
Private Limited
Performance begins before paint.
AddressPL.NO 14, SF.NO 224/11,
Kalaimagal Nagar, Pazhanthandalam,
Kundrathur, Chennai – 600 132,
Tamil Nadu, India
Kalaimagal Nagar, Pazhanthandalam,
Kundrathur, Chennai – 600 132,
Tamil Nadu, India
Metal surface treatment specialists05