| ELEMENT | ZINC ANODES | ALUMINUM ANODES |
|
Aluminum Copper Tin Cadmium Iron Lead Silicon Others Zinc |
0.002% max. 0.002% max. 0.001% max. 0.003% max. 0.003% max. 0.003% max. -- 0.010% max. total Remainder |
Remainder |
PACKAGING SPECIFICATIONS
Packaged anodes are packed in a rugged water permeable cardboard tube having a minimum wall thickness of 2.3 mm. Positioning devices have been designed to ensure a minimum distance of 25mm between any surface of the anode and the cardboard tube. This feature also ensures the anode will be kept centered during transportation and handling of the anode before installation.
Backfill material is a low resistivity (45 ohm-cm maximum) gypsum/bentonite/sodium sulphate mixture with the following nominal composition:
Ground Hydrated
Gypsum 75-77%
Powdered Wyoming Bentonite 15 - 20%
Anhydrous Sodium Sulphate 5 -8 %
The backfill has a grain size so that 100% passes through a 20 mesh screen and 50% is retained on a 100 mesh screen. The backfill is vibrated during final packaging to ensure complete coverage. Anode core lead wires are available in various materials to meet customer requirements. Lead wires are silver soldered to the 1/8" steel core wire and are then insulated by filling the recess and any voids in the lead wire core connection with an electrical potting compound.
ENGINEERING
Corrosion problems vary and are influenced by a wide range of factors. Detailed surveys of corrosion protection requirements using field survey services may be needed to determine specific protection requirements. CANADA METAL's variety of anode types and styles provides a complete range of products for specific applications. Custom shapes and sizes can be designed for almost any application.
QUALITY CONTROL
CANADA METAL's total Quality Program guarantees consistently reliable products through Chemistry, Production Control and Product Testing and Certification.
CHEMISTRY
Chemical composition of metal is determined using the industries most sophisticated computer controlled atomic spectrograph.
Samples can be taken and analyzed at various points in the production process:
-
Prior to Casting
Primary metal is used which ensures low level impurity levels specified are met. -
During Casting
The alloy is checked to insure optimum chemistry for anode efficiency. -
After Casting
Test samples made during pouring are analyzed to ensure chemistry integrity.
PRODUCTION CONTROL
Casting parameters are continually monitored to control production variables.
Anodes are weighed as the casting process is complete. Anodes that do not meet minimum weight requirements are rejected.
Anodes are physically inspected for excessive shrink cavities, core position and physical appearance to insure the highest quality possible.
CANADA METAL's anodes are tested to determine electrical and current capacity. This testing is intended to be used for quality assurance by CANADA METAL and end users. Long term field performance properties may not be identical to property measurements obtained using laboratory tests.
