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SPECIAL CASING MATERIAL
SANJIU Standard cooling towers apply the latest type of Highly Corrossion-resistant coated steel sheet with a coating composition consisiting of zinc as the main substrate, in combination with Al(11%), Mg(3%), and a trace amount of silicon.This special material is named as 'SuperDyma' by Nippon Steel.
  Corrosion Resistance of Flat Surfaces                                                                                               
Specime Type of coating Coating
mass
Surface
treatment
Thickness
Hot-dip Zn-coated sheet Zn Z27 Special
chromate
treatment
1.6mm
SuperDyma –3%Mg–0.2%Si
Zn–11%Al
K18
Galvalume
Steel Sheet
Zn–55%Al AZ150
Corrosion Resistance of Flat Surfaces  (Results of JASO)
  Corrosion Resistance at Cut-end Surfaces
◆Not only highly rust resistant on flat surfaces;
◆ But also superiorly corrosion proof on cut-end surfaces, self 'recovered'.
◆ In additional, of extremely high alkaline resistance.
The corrosion resistance of this innovative alloy coated steel is enhanced by the composite effect of adding aluminum, magnesium and silicon to the conventional zinc coating. Silicon, among other elements, is highly effective in inhibiting corrosion when combined with Magnesium.
Corrosion Resistance at Cut-end Surfaces (Results of Salt Spray Tests)
 Specimen conditions
 Thickness: 3.2 mm
 Surface treatment: No treatment
Salt spray test: 500 hours
Hot-dip Zn-coated sheet
Coating mass: 100 g/m2/side
 
  1  
 
SuperDyma
Coating mass: 90 g/m2/side
 
  2  
 
Galvalume Steel Sheet
( Laboratory trial-made sample)
Coating mass: 90 g/m2/side
 
  3  
 
Test conditions:
Cyclic corrosion test (JASO M609-91 method), Repetition of ① to ③ as a cycle.
① Salt spray: 2 hours (5% NaCl, 35℃)
② Drying: 4 hours (60℃)
③ Wetting: 2 hours (50℃, humidity 95% or more)
Superior Raw Materials, Advanced Tech Design, Precise Fabricating Equipments, All These Created Reliable Cooling Towers of SANJIU!
HIGH GRADE COMPONENTS
Pumps- GSD
Fans- QIANCHUAN, MINGXIN, COFIMCO
Motors- TECO
Spray Pipes- FORMASA
Control Panels-RITTAL (optional)
Electrical Parts- CHNT, SCHNEIDER, ABB
Valves- DUN AN
Fasteners- GEM YEAR, TONG MING

Wuxi Sanjiu Cooling Equipment Co., Ltd.
101 Xinjin Rd, Wuxi City, Jiangsu Province, China.

+86-13559666650(WhatsApp)
+86-510-85312176

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