Pretreatments
Citric Acid Passivation
I would like to set up a citric acid passivation line as follows: heated citric, drag-out tank, three cascading unheated rinse tanks and possibly a heated rinse to help in drying. Am I missing any tanks and or accessories that you would recommend?
Read MoreCopper Sulfate Test for Passivated Parts
Why is the copper sulfate test a common test to know if the passivation process is in good quality?
Read MoreStainless Steel Streaking After Passivation
After passivating 347 stainless steel per AMS700 Type VI there is a stain pattern. On inspection at 10x magnification, I see that the surface is pitted. Process steps are alkaline degrease at 140°F, two rinses, final rinse in reverse osmosis water, nitric strike at 5 percent by volume, then two rinses with the final reverse osmosis (water quality 200 ppm). The stains or discolorations are in a straight line pattern. Any suggestions?
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Protech Purchases Texas' Innotek Powder Coatings
Innotek of Big Spring, Texas specializes in high performance thermoplastic powder coatings.
Read MorePowder Coating Q&A: Powder on Aluminum Extrusion
Q. Can powder coatings meet AAMA 2604 and 2605 standards? What are the strengths and limitations of powder versus liquid coating? Read Rodger Talbert's answer
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ECOAT Q&A: Quoting E-Coat Costs
Q. I have a customer who wants me to quote his product line based on an average square-foot price without analysis of the parts. How can I accomplish this?
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Cleaning Limescale from Galvanized Steel
How do you clean white lime scale and rust spots on galvanize?
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Concrete Evidence for Proper Pretreatment Before Painting
Road construction equipment maker Gomaco gets better adhesion, more efficient line after getting the right cleaning and pretreatment system in place that could help deliver high-quality products, while at the same time offer increased efficiencies.
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PARTS CLEANING: Re-Thinking Precision Cleaning of Tools
A new cleaning line has eliminated manual scrubbing labor and increased throughput for Hardcoating Technologies as its commitment to quality has taken it from coating 67,000 cutting tools in its first year to more than 1.7 million over the next decade. The company now coats more than two million parts annually.
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PARTS CLEANING: Ultrasonic Cleaning for Large Lots of Small Parts
With ultrasonic cleaning, particulate and film-like soils can be removed not only reliably, but also very quickly and efficiently—even on parts with difficult-to-access hollow spaces such as blind holes, knurling and grooves.
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