Page 1 of 3 Fastenal Product Standard REV -01
Date: May 6, 2016 C.1000.ECO.ACQ
1. SCOPE
a. This specification covers the basic requirements for a REACH and RoHS compliant coating system that greatly reduces corrosion, in applications with ACQ lumber. The coating consists of a three layer process: a zinc rich base layer, and a multi layered, water soluble epoxy-modified topcoat.
b. The top coat is applied by conventional dip-spin or spray method which can be handled through a cleaning, coating and baking operation and which is not adversely affected by baking temperatures below 428° F (220° C). No layer is electroplated
2. PROCESS REQUIREMENTS
a. Prior to coating, the parts shall be free from oil, scale and similar foreign materials. The cleaning process shall have no detrimental effect on the base material. Any process used for cleaning such as acid pickling which can promote hydrogen absorption shall be prohibited. Written approval from Fastenal Quality Control will be required for any deviation from this process.
3. COATING REQUIREMENTS
a. Appearance – i. The coating shall have a uniform appearance free from tears, blisters, uncoated areas, and other discontinuities which may affect the appearance of the coating.
ii. The color shall be silver-gray unless otherwise specified. See Figure 1
iii. The coating shall not be tacky to the touch and shall not leave particulate residue on equipment hands or gloves.
b. The complete finish, including the topcoat shall be free of chromium, cadmium, lead, barium and mercury, as well as meet the requirements of EU Directives on End of Life Vehicles (ELV) REACH and Electrical Equipment (RoHS).
c. Topcoat – Two layers of a baked epoxy-modified coating make up the topcoat and are applied separately over a metallic zinc layer as required, and must meet the requirements defined in this specification. Page 2 of 3 Fastenal Product Standard REV -01
Date: May 6, 2016 C.1000.ECO.ACQ
d. Thickness - The coating shall not have any adverse effects on normal installation and removal practices. For reference, a typical zinc rich layer (B06J/B06JA) of 0.0003” minimum (8µm), and the epoxy-modified topcoat layer is a multi-layer, applied independently, with a thickness of approximately 0.0004” to 0.0005” (10- 12 µm). Thicknesses are based on an average of individual measurements when measured on the significant surface as defined by ASTM F1941 or ISO 10683.
e. Adhesion – The coating shall meet the adhesion requirements prescribed in ISO 10683. The coating shall also not peel, flake or tear when tested per the specifications listed in Section 4 below.
f. Corrosion Resistance – The coating shall be capable of withstanding exposure to salt spray when tested in accordance with ASTM B117 or ISO 9227 to the minimum hours specified in Table 1 prior to red rust. Unless otherwise defined, acceptable corrosion resistance shall be Rust Grade 6 or higher per ASTM D610 on significant surfaces as defined by ASTM F1941 or ISO 10683. Corrosion testing shall be tested after removal from the test plates used in section ‘e’ above.
Note 1: As defined in ASTM F1941, corrosion at the edges, holes, deep recesses, bases of angles of the significant surface, shall not be cause for rejection.
Figure 1
g. Coating applied shall not be allowed to pool into the drive recess of the screws. The screws shall be capable of meeting the minimum torsion requirements of the applicable product specification, using the relevant drive bit without stripping out the drive recess. Torsion failure shall occur in the screw, at any location below the recess depth of the drive, (as if the screw was uncoated).
Table 1 Salt Spray Requirements Product Description and Size Minimum Salt Spray Hours Lag Screws, Wood Screws, Self-Drilling 1000 (Red Rust) Screws and Sheet Metal Screws
Page 3 of 3 Fastenal Product Standard REV -01
Date: May 6, 2016 C.1000.ECO.ACQ
h. There shall be no signs of blistering after salt spray testing.
i. Cathodic Protection - The cathodic protection capability of the coating shall be tested utilizing the salt spray test above for a duration of 72 hours with a specimen which has been scratched down to the base metal. The scratch shall have a maximum width of 0.02” (0.5mm). After the salt spray test, there shall be no red rust in scratched area.
4. PERFORMANCE REQUIREMENT a. Wood and lag screws shall not tear, peel or flake during ACQ Lumber drive testing.
b. Sheet metal screws shall not tear, peel or flake during sheet metal drill testing, when tested per ASME B18.6.3.
c. Self-drilling Screws shall exhibit no signs of coating flaking, peeling or other damage that results in exposed base metal of the screw, testing per IFI 113 and ISO 10683.