Heavy Zinc Electroplate
Electroplate galvanization which coats the base metal with a combination of zinc and chromate. Thickness of the coating is in accordance with ASTM A 641 class 1 to provide extra corrosion resistance. Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

 305 Stainless Steel
305 stainless steel is a nickel chromium austenitic grade of stainless steel and is inherently non-magnetic. This material is not hardenable by heat treatment and provides very good corrosion resistance. No visible sign of surface red rust at 1000 hours of ASTM B117 salt spray test.

C-3 Mechanically Galvanized
Mechanical galvanization provides a protective zinc and tin coating over base metal. The coating is applied by mechanically tumbling zinc and tin powder with base metal and non-metallic impact beads. Less than 1% surface red rust at 1000 hours of ASTM B117 salt spray test

Clear Zinc
Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

Climaseal®
A proprietary coating system that combines a mechanically plated zinc undercoat with a thermosetting polyester top coat applied in multiple layers using dip-spin technology. Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications.

Gray Phosphate
Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

 N2000® Mechanically Galvanized
Mechanical galvanization provides a protective zinc nickel alloy coating over base metal. The coating is applied by mechanically tumbling base metal with non-metallic impact beads and zinc powder. Less than 10% surface red rust at 1000 hours of ASTM B117 salt spray test.

 Quik Guard©
A duplex coating system that combines an electroplated zinc and chromate substrate with an organic top coat. The electroplated zinc layer provides sacrificial protection of the steel substrate while the topcoat creates a durable barrier. Typical coating thickness is 8 - 10 microns top coat over 8 microns minimum zinc/chromate base coat. Less than 10% surface red rust at 950 hours of ASTM B117 salt spray test.

Yellow Zinc Dichromate
Coating offers minimum amount of corrosion protection and is intended for dry, non-corrosive applications only.

General note about salt spray testing: Salt spray testing in accordance with ASTM B117 is not intended to represent real world corrosion performance of screw coatings. It should only be used for comparative evaluation between like products. Many variables can affect the outcome of the salt spray test, such as screw features, coating types, post coating processes, etc.

Low- Heavy Zinc Electroplate, Yellow Zinc Dichromate, Clear Zinc, Gray Phosphate, C3 Mechanically Galvanized
Med- N2000, Quik Guard
High- Stainless Steel

1. Use stainless steel with any treatment chemical not listed above or in uncertain environmental exposure condition.
2. For wood with actual retention levels higher than 0.10 pcf (above ground) for CA-B, or 0.25 pcf (above ground) for ACQ-D and MCQ stainless steel fasteners are recommended. Verify actual retention level with wood treater.
3. Borate treated woods are not appropriate for outdoor use.
4. Test results indicate that N2000 and Quik Guard will perform adequately, subject to regular maintenance and periodic inspection. However, the test protocol followed was a modified accelerated version of the nationally recognized test method AWPA E12-94, so data over an extended period of time is not available. Also noteworthy is that tests run in a laboratory may not correlate to service conditions. If uncertain, use stainless steel.
5. Some treated wood may have excess surface chemicals making it potentially more corrosive. If you suspect this or are uncertain, use stainless steel.
6. Ammonia is typically used as a chemical carrier for difficult to treat wood species, such as, but not exclusive to, Douglas Fir and Hem Fir, which are usually found in the western United States. Amine carriers are used in some of the eastern species, such as Southern Yellow Pine. If uncertain, verify chemical carrier with wood treater.
7. Where noted in the table, applications where the wood is dry (moisture content less than 19%) when installed and will remain dry in-service may use a minimum coating recommendation of "Low".

For the latest Quik Drive coating/finish information and additional technical information on this topic, view our corrosion information.