Main Materials - Wuxi Sanjiu Cooling Equipment Co., Ltd.

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

SuperDyma

Coating mass: 90 g/m2/side

Galvalume Steel Sheet

( Laboratory trial-made sample)

Coating mass: 90 g/m2/side

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