Presentation on theme: "Marshal Nano - Silicate Coating Zinc Plating Followed by Cr Passivation is an old proven success for corrosion prevention of Steel New Generation coatings."— Presentation transcript:
Marshal Nano - Silicate Coating Zinc Plating Followed by Cr Passivation is an old proven success for corrosion prevention of Steel New Generation coatings are Eco friendly and improved, like Trivalent Chrome Passivations Can the Corrosion of Steel be prevented even further ??? Yes the Answer is Marshal Nano Coat 730 Marshal Laboratories Pvt. Ltd.
How Marshal Nano-Coat 730 Works Base Metal Zinc Cr Passivation layer with lots of Oxygen Marshal Laboratories Pvt. Ltd.
Nano-Coat 730 is a liquid concentrate with coupling agent which reacts with the passivation layer over Electroplated Zinc forming a composite coating. How Marshal Nano-Coat 730 Works Base Metal Zinc Zn – Zn – Zn – Zn – Zn - Si – O – Si – O – Si – O OOO
Fundamentals Once The Passivation over Zinc surface is composite, it sharply increases the corrosion potential. The Composite layer is more tough to get broken by corrosive atmosphere. Silicates provide flexibility to coating for self healing in case of any scratch or distortion. The composite layer does not change coefficient of friction Marshal Laboratories Pvt. Ltd.
The Process Zinc Plating Nitric Acid Dip Nitric Acid Dip Dry Passivation Nano-Coat 730 Oven Cure 160- 180 Deg C 20 min Oven Cure 160- 180 Deg C 20 min Marshal Laboratories Pvt. Ltd.
Marshal Nano- Coat 730 Product Detail Solvent based chemistry Supplied in concentrate form Can be used as it is or diluted with Special Thinner Marshal Laboratories Pvt. Ltd.
Operational Parameters ParameterOptimum Range Viscosity ( Zhan Cup 2 ) Temperature Solid Content 18 to 20 Seconds 20 to 35 Deg C 15 to 18 % Marshal Laboratories Pvt. Ltd.
Operating Conditions Nano-Coat 730 Contact Time Curing Can be Applied in Dip-Spin Machine for Barrel Components Can be Applied by Spray for VAT Components. 15 to 20 Seconds are sufficient to get complete reaction Best range between 180 to 220 Deg C for 20 mins Marshal Laboratories Pvt. Ltd.
Factors Influencing Coating Temperature : Coating thickness mainly depends on viscosity which in-turn affected by temp. Proper temp. Control should maintained. Viscosity : Need to be controlled by regular additions of concentrate or Thinner Marshal Laboratories Pvt. Ltd.
Factors Influencing Coating Moisture : Since the chemistry is solvent based water content is not permitted. The components should be perfectly dried before application. Room Humidity should not exceed 45% RH value. Incase of rainy season special care should be taken to control humidity Marshal Laboratories Pvt. Ltd.
Thickness 8 to 10 MicronsRetention of glossSalt Spray Hrs as per ASTM B117 test200 to 300 Hrs White Rust550 to 700 Hrs. Red RustApplicable on all types of Passivation
Thickness 8 to 10 MicronsIncrease in GlossSalt Spray Hrs as per ASTM B117 test200 to 300 Hrs White Rust550 to 700 Hrs. Red Rust
Marshal Nano Coat 730 over Zinc Flake coating Chemical Degreasing Sand Blasting Rinse Zinc Flakes 4 - 8 µm Marshal Nano - 730 Salt Spray Chamber Corrosion Resistance 700 - 1000 hours to Red Rust (1 step) 1500 – 2000 hours to Red Rust (2 steps) The corrosion resistance depends on the type of zinc flakes Marshal Laboratories Pvt. Ltd.
Thermal resistance and adhesion ` Test MethodResults Thermal Resistance-12 hours at different temperatures - appearance and salt spray test Until 200°C there are no changes in corrosion protection AdhesionScratch Test (ASTM D633) No foil Electrical conductivityConductometricInsulating Mechanical wear and tear Salt spray test after passage in shaker No variation in corrosion resistance Marshal Laboratories Pvt. Ltd.
Benefits Of Marshal Nano-Coat 730 Low Viscous liquid hence easy to penetrate in crevices and difficult to reach areas. Low Thickness 2 to 3 microns and hence no clogging. Good wear and tear resistance. Excellent Chemical resistance. High Corrosion resistance Can be applied on all types of Passivations over Zinc –Zinc Alloy plating Marshal Laboratories Pvt. Ltd.
Advantages Of Nano-Coat Replaces Conventional Processes like Shortcomings Zinc-Fe Plating Zinc- Ni Plating Process requires tight Temp. control. Narrow Process Control. Sensitive to impurities. Restriction on passivation color. Alloy plating, requires process control. Expensive due to cost of Nickel
Dip and Spin Machine Machine Specifications The machine is microprocessor based automatic Loading capacity 25 Kgs Dual Speed operation: Slow speed for Dipping and Higher speed for spinning Solution Holding sump 60 Lits Cycle time 5 mins
Machine Cycle Steps Push >> Start Button to start The Cycle Suction Pump pores the Marshal Nano- Coat from sump to Basket Chamber Basket Rotates Clock and Anti Clock wise, with low speed for 20 Seconds Solution is drained back to Sump Basket Rotates Clock wise and Anticlockwise at high speed to remove excess Nano-coat from surface for 20 seconds Buzzer On >> Cycle complete