Check out this blog, from our sister brand IFS Coatings, which covers powder application issues, problems and fixes! A comparison of a spring that was applied with powder vs. liquid coating. powder coating is done on our covers; it gets shrunk in certain areas in a kind of pin hole or cloud. These common mistakes happen when you become impatient and blast the part with a heavy fog of powder or don’t let the gun’s powder flow stabilize before attempting touch-up work. Voltage too high. Too much wet film can cause the coating to crack as it cures; too little coating increases the risk that the substrate will not be sufficiently protected, leading to rust spots. Powder Coating: The Complete Guide is an educational site for powder coaters. Poor gun placement. 2. still have the same problem. Turn air settings down so powder/air stream does not blow powder out of corners . Coating.com.au is the #1 resource for the Coating Industry in Australia with hands-on coating and painting guides to help consumers and professionals in this industry save time and money. Apply a dab of polish about the size of the stain and rub it in a circular motion to remove the stain. To coat a control cabinet with powder coating, a roughly structured powder coating is typically used. Q. AkzoNobel Powder Coatings Interpon TC Ripple Product Description Interpon TC Ripple is a series of TGIC Free Polyester based powder coatings designed for the exterior ... coatings will result in spots of visible substrate. when we peeled the paint we discovered white spots beneath it on surface. Heat is … Scratches in the sheet metal due to processing, impurities, welding spots and other minor defects in and on the surface can be concealed by the coating using a roughly structured powder coating. On some eyepieces I find tiny reflective specs on the coating that I cant clean off. The powder coating process is a dry painting process that is mainly used for coating metal. This can affect not only the aesthetics of the part, but the ability to assemble it. A discussion started in 2002 but continuing through 2019. The powder coating not only provides a visually appealing finish, but a scratch resistant coating to the metal object. 6. A powder coating polish has a light abrasive formula that will actually scratch the surface very lightly to “scrape” the stain off of the surface. Coating.co.uk is the #1 resource for the Coating Industry in the UK with hands-on coating and painting guides to help consumers and professionals in this industry save time and money.. Spots on eyepiece coating - posted in Eyepieces: I like to keep my eyepieces clean. Poor ground. Touch up any spots you see before curing the part, but be careful not to add too much powder or to let the gun puff powder onto the touch-up areas. Disclaimer: Powdercoatguide.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Powder Coating 1 Product Data Sheet. Very characteristic defects are caused by electrostatics. The powder coating also protects the bollard from damage from the elements, as well as the effects of diluted road de-icing salts. It's a sad moment, expecting a … Excessive charge can build up in a powder coating layer if the powder is applied too thick, too quickly. The very short answer is that yes you can often times apply powder coating over an existing paint. As more powder is sprayed onto the part, it adheres to the tacky spots and builds up, resulting in uneven coating thickness. Because of excessive moisture which gives color during compaction and metal particles black spots appear in tablets after compression. A powder coating is a popular finish choice for bollards, since it provides a high level of protection from nicks and scratches, which may be caused by vehicles and pedestrians alike. Joey teaches monthly powder coating classes and can also be found speaking at industry events or in his role as consultant to over a half-dozen cable television programs. Spraying powder coat is a fairly simple point-and-shoot job once you get the hang of it. The most important stage of powder coating phosphate wash is properly preparing the parts by cleaning residues left from prior processes like welding, grinding, and drawing residues such as machining oils, grease, dust, and rust and then iron phosphate coating. Because powder coating is a solid it can be applied more heavily than liquid paints without having to worry about runs, drips, or sags. prateek gupta - … ... As more powder is sprayed onto the part, it adheres to the tacky spots and builds up, resulting in uneven coating thickness. I am spraying by SG-100 and the parameters as the Praxair suggested. This phenomenon is known as back ionization. But the most important is this: Can powder coatings be used past the expiration date given by the supplier? A tin free, bismuth octoate, high active, free flowing powder, designed for use as a catalyst with polyester and polyurethane powder coating paint systems. 3. They are only visible when carefully inspecting the eyepiece in the light. i checked my gun and clean it. It is an ecologically safe replacement for amines and dibutyl tin dilaurate conventional catalysts. Powder coating flows evenly when heated, so there is no area with an uneven coat. Exposure to the wrong chemicals, temperatures, and mechanical stress factors can damage a powder coating or wear it away. There are several methods for applying powder coating. So now I have many questions in regards to powder coatings. After you have done all of the necessary cleaning, blasting, and masking; shooting the powder is the next step.This article will help you achieve the correct coating thickness and avoid orange peel and other defects. Powder Coating: Good contamination control prevents defects from start to finish. It comes in six of the most popular anodized finishes and meets the AAMA 2604 performance specification. Posted by on 22 September 2017 Anyone who has ever applied powder coatings knows that it doesn't go smoothly 100% of the time. I have traveled and worked in Colombia and have very fond memories of my time … 2002. His down-to-earth demeanor and common sense approach to business make spots in his classes one of the most sought after in the world. Thanks Claudia Helsum Medellin, Colombia Hello Claudia, Thanks for the question. 1. The most commonly used method is spraying electrostatically charged particles of pigment and resin onto an electrically grounded piece. ... Fixing White Spots on Black Anodized Finishes Details My brand new Morpheus also had one. 3. However, prior to doing so there are a lot of important factors to consider. From Sydney and Melbourne to Brisbane and Perth, we service all of Australia. Following problems on mild steel panels powder coating are observed after the process is complete: 1) Powder peel off 2) Dust particles observed 3) Orange peel … white spots in black powder coating 05-25-2012, 11:47 PM i have white spots in the black powder coating i did on some rims. the day before i did some parts in black with out a problem. 6. Powder coating is a painting technique that is used on many factory made metal items. Powder coatings can be incredibly resilient, but even the best coatings can take only so much. 1. Colour spots can be small points of colour mix, generally caused by contaminated equipment, residue from cleaning, or cross contamination in manufacturing. Hi Joe: I'm selling powder coating in South America. Adjust gun position so powder cloud has a direct path to recess area. Ive seen them on eyepieces from various brands including Pentax. The coatings are a smooth, low gloss powder coating applied in one coat with no clear coat required. please guide what the problem is and its remedy. Powder Coating Application Issues, Problems & Fixes. (04-03-2017, 08:02 AM) Aliebram Wrote: Hi Friends, I lost my old user and this is new. Liquid paint tends to be thin near edges or bends in the surface. Back charging – powder layers are repelled from part in spots. After spray there are small black spots on the coating. The powder is actually tiny scales made from modified hairs. Problems / defects in powder coating. I highly doubt they have any effect on the image. The scales are pigmented but they also contribute to the pattern on the wings by diffracting light through a complex microscopic structure of ribs and holes. Sometimes when you peel back the wrapper, though, you may notice some white spots on the chocolate. Powder Coating Appearance Evaluation. This can affect not only the aesthetics of the part, but the ability to assemble it. Powder Coating is a high performance method of finishing products as it does not run, drip, sag, or exhibit “solvent pops.” Furthermore, powder coating offers excellent resistance to heat, abrasion, impact, UV from sunlight, and corrosion. Moths, like butterflies, belong to the order Lepidoptera, which means ‘scale wing’. For example, a nylon-based powder coating can quickly be damaged by exposure to methanol or to oven-like temperatures. I have an issue by TBC. One of the advantages of powder coating is how good the finished product looks. 5. A: Powder coating is a method for finishing products through the application of tiny dry paint particles. The build-up of charge causes powder particles … Specifications we have same problem elsewhere too. Covering the world of surface finishing and industrial coatings, including electroplating, electrocoating, liquid coating, powder coating, mechanical finishing, anodizing, pretreatment and pvd vacuum coating. In this video, I show you the exact process I use to powder coat. All your products should be inspected before shipment to make sure that there aren’t gaps in coverage, bubbles, warping or poor coating application. It's a white powder that many are confused by. • Fast substrate heat-up rates required. If you are in need of coating expertise for a project, or looking for a free quote to challenge your current suppliers, get in touch through our Free & Quick Quote service. Rather than applying the paint in a wet state, we use a clean and efficient electrostatic powder coating process that relies on the attraction between charged particles that are fused together. Gun positioned too close to part. Powder coating is sometimes referred to as “dry painting”. 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