Material standards for contact agents
1 Scope:
This standard stipulates the contact agent used in the hot-dip galvanizing drying process - zinc chloride + ammonium chloride (2 or 3 salt compounds). The supplier or manufacturer of this material should meet the following requirements of this standard:
2. Process requirements
2.1 Description: Colorless or light yellow crystals.
2.2 Level: There are two levels to choose from:
2.2.1 Standards
2.2.2 Standard with wetting agent
3. Certificate of conformity
Delivery must be accompanied by a certificate proving compliance with this standard.
Material standards for zinc-aluminum alloys
1 Scope
This standard regulates the zinc and aluminum ingots added to the zinc bath during the hot-dip galvanizing process. The supplier or manufacturer of this material should meet the following requirements of this standard.
2. Process requirements 2.1 Chemical composition
Aluminum=4.5-5.0% Copper=max 0.001% Magnesium=max 0.002% Lead=max 0.003% Iron=max 0.003% Cadmium=max 0.002% Sh=max 0.002%
2.2 Weight: about 9.5-10kg.
3. Certificate of conformity
Delivery must be accompanied by a certificate proving compliance with this standard.
Material standards for zinc-lead alloys
1 Scope
Description: Hot-dip galvanized zinc ingots (zinc sheets) comply with ASTM B-6-95 requirements. Grade: Original Western Standard contains approximately 1% lead.
2. Process requirements
2.1 Chemical composition: Lead: 0.5-1.4 Iron＜0.05 Cadmium＜0.01 Copper＜0.002 Tin＜0.001 Aluminum＜0.005
2.2 Weight: about 25kg.
