Powder Coating

PowderCoat Max

Powder Over Hot Dip Galvanizing

When considering the advantages of the WJM powder coating process, it’s difficult to understand why anyone would choose a lighting standard with a liquid paint finish. An unwavering commitment to quality has led WJM to refine its factory coatings and has resulted in WJM’s innovative PowderCoat Max Process, featuring a powder coating facility located in Sugar Land, Texas, a suburb of Houston. This facility provides WJM with technology to provide factory finishing that is superior to any currently offered in the outdoor lighting industry. WJM was developed for outstanding weatherability, toughness, and architectural aesthetics. WJM is proud to say that the PowderCoat Max Process stands as the most sophisticated, decorative, and corrosion-resistant finish on the market.

SPECIFICATIONS
Gloss	ASTM D-523-60 deg 50% to 60% gloss
Pencil Hardness	ASTM D-3363-2H minimum
Impact Resistance	ASTM D-2794-160 inch lbs. forward/reverse
Flexibility	ASTM D-522-180 deg bend over 1/4″ mandrel
Adhesion	ASTM D-3359B – no lifting of coating
Salt Spray Resistance	ASTM B-117-1000 hrs. in 5% solution at 95° F and 95% relative humidity produces no blistering and less than 1/16″ undercutting from scribe
Humidity Resistance	ASTM D-2247-100% relative humidity at 100F for 1000 hours-no effect
Weatherability	ASTM D-822-1 year south Florida exposure at 45° angle 91% of gloss retention

Superiority

WJM Powder Coating Process was developed for outstanding weatherability, toughness, and architectural aesthetics. When considering the advantages of the WJM Powder Coating Process powder coating process, it’s difficult to understand why anyone would choose a lighting standard coated with liquid paint. WJM Powder Coating Process powder coating is 100% solid with every powder particle containing the total color system. The high molecular weight of WJM Powder Coating Process powder coatings provide better corrosion, impact, chip, and scratch resistance, which means less damage. Adhesion problems associated with multiple coats of liquid paint are eliminated. There are no runs, sags or drips in WJM Powder Coating Process powder finishes. Paint defects such as solvent popping, pinholes, and blistering are eliminated, since there are no solvents in powders. WJM Powder Coating Process is highly resistant to diluted aqueous acids, salts, aliphatic and aromatic hydrocarbons, solvents, alcohols, grease and oils. WJM Powder Coating Process provides UV protection which eliminates chalking and minimizes color fading. Low molecular weight, liquid systems simply can’t compare with WJM Powder Coating Process high molecular weight powders. Liquid system finishes are easily chipped and scratched, and require constant care to maintain appearance, and most important, to prevent corrosive damage.

Process

Step 1 - Metal Preparation

The exterior surface is cleaned with an alkaline rinse to remove dirt, oil or surface contaminants. The exterior metal surface is then blasted with a combination of shot and grit, to remove all mill scale, oxides, or any foreign matter. Excess shot and by-products from the blasting operation are blown off with dry, compressed air. Blasting in accordance with the above requirements provides a 1.5 mil profile anchor pattern for a maximum fusion bond to the substrate. This surface satisfies the “near white” specification as published by the Steel Structures Painting Council Standards SSPC-SP10 (near white).

Step 2 - Chemical Treatment

The blasted metal surface is chemically pretreated with an iron phosphate conversion coating applied at high pressure at 110° to 120° F. The preheated surface immediately receives an ambient fresh water rinse containing special surfactants and sealers. The phosphated exterior metal surface is force dried by convection heat at approximately 200° F., forming a dry tight micro-crystalline coating not less than 50mg./sq.ft. of iron phosphate on the surface.

Step 3 - Powder Coating

WJM Powder Coating Process is a special powder coating formulated from a unique combination of polyester resins designed to exhibit superior outdoor weatherability, durability and gloss retention. WJM Powder Coating Process is applied with state-of-the-art electrostatic powder coating equipment to a uniform 8 mil finish. Charged powder particles adhere to the surface of the lighting standard to form a high molecular weight, fusion-bonded finish. Precisely controlled bake times and temperatures ensure complete bonding and dispersion of pigments and resins.

Step 4 - Internal Coating

The internal base-end of the pole is blasted, cleaned and powder coated for a minimum of 12 inches from the baseplate. The entire internal surfaces including powder coated area at the base-end are coated with a thermoplastic hydrocarbon resin system specially formulated for application over untreated steel surfaces. Its applied in a manner to ensure complete, uniform ID coverage to a thickness of 3 mils. The internal coating contains special corrosion inhibitors and is capable of passing 1000 hours of salt spray exposure (ASTM B-117).

THP

SS

ST

RS

RT

RTT

RTS

RTE

RTU

SLX Crossarm

SLT Platform

SA

RA

RTA

A95

PB

A94

XASQ

XA

BH

BHR