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. Spots on eyepiece coating - posted in Eyepieces: I like to keep my eyepieces clean. The powder is actually tiny scales made from modified hairs. 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.. It comes in six of the most popular anodized finishes and meets the AAMA 2604 performance specification. Q. This can affect not only the aesthetics of the part, but the ability to assemble it. From Sydney and Melbourne to Brisbane and Perth, we service all of Australia. 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. Powder coating flows evenly when heated, so there is no area with an uneven coat. There are several methods for applying powder coating. This phenomenon is known as back ionization. A tin free, bismuth octoate, high active, free flowing powder, designed for use as a catalyst with polyester and polyurethane powder coating paint systems. Liquid paint tends to be thin near edges or bends in the surface. Hi Joe: I'm selling powder coating in South America. Very characteristic defects are caused by electrostatics. Powder Coating 1 Product Data Sheet. the day before i did some parts in black with out a problem. Specifications To coat a control cabinet with powder coating, a roughly structured powder coating is typically used. 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. This can affect not only the aesthetics of the part, but the ability to assemble it. Powder Coating: Good contamination control prevents defects from start to finish. Back charging – powder layers are repelled from part in spots. Powder Coating Application Issues, Problems & Fixes. 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. On some eyepieces I find tiny reflective specs on the coating that I cant clean off. Covering the world of surface finishing and industrial coatings, including electroplating, electrocoating, liquid coating, powder coating, mechanical finishing, anodizing, pretreatment and pvd vacuum coating. i checked my gun and clean it. Posted by on 22 September 2017 Anyone who has ever applied powder coatings knows that it doesn't go smoothly 100% of the time. Heat is … Powder coating is sometimes referred to as “dry painting”. It's a white powder that many are confused by. 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. when we peeled the paint we discovered white spots beneath it on surface. 1. 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. In this video, I show you the exact process I use to powder coat. Powder Coating: The Complete Guide is an educational site for powder coaters. 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. Colour spots can be small points of colour mix, generally caused by contaminated equipment, residue from cleaning, or cross contamination in manufacturing. Sometimes when you peel back the wrapper, though, you may notice some white spots on the chocolate. All your products should be inspected before shipment to make sure that there aren’t gaps in coverage, bubbles, warping or poor coating application. However, prior to doing so there are a lot of important factors to consider. Ive seen them on eyepieces from various brands including Pentax. please guide what the problem is and its remedy. A comparison of a spring that was applied with powder vs. liquid coating. Spraying powder coat is a fairly simple point-and-shoot job once you get the hang of it. 2. The powder coating also protects the bollard from damage from the elements, as well as the effects of diluted road de-icing salts. The very short answer is that yes you can often times apply powder coating over an existing paint. The coatings are a smooth, low gloss powder coating applied in one coat with no clear coat required. 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. (04-03-2017, 08:02 AM) Aliebram Wrote: Hi Friends, I lost my old user and this is new. 1. The powder coating not only provides a visually appealing finish, but a scratch resistant coating to the metal object. After spray there are small black spots on the coating. 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 … ... Fixing White Spots on Black Anodized Finishes Details 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. Excessive charge can build up in a powder coating layer if the powder is applied too thick, too quickly. Adjust gun position so powder cloud has a direct path to recess area. The powder coating process is a dry painting process that is mainly used for coating metal. I have traveled and worked in Colombia and have very fond memories of my time … ... As more powder is sprayed onto the part, it adheres to the tacky spots and builds up, resulting in uneven coating thickness. A discussion started in 2002 but continuing through 2019. 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. Powder Coating Appearance Evaluation. Powder coating is a painting technique that is used on many factory made metal items. 5. Exposure to the wrong chemicals, temperatures, and mechanical stress factors can damage a powder coating or wear it away. The build-up of charge causes powder particles … 3. Because powder coating is a solid it can be applied more heavily than liquid paints without having to worry about runs, drips, or sags. Apply a dab of polish about the size of the stain and rub it in a circular motion to remove the stain. • Fast substrate heat-up rates required. It is an ecologically safe replacement for amines and dibutyl tin dilaurate conventional catalysts. Gun positioned too close to part. powder coating is done on our covers; it gets shrunk in certain areas in a kind of pin hole or cloud. 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. 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 am spraying by SG-100 and the parameters as the Praxair suggested. It's a sad moment, expecting a … I highly doubt they have any effect on the image. 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. Poor gun placement. 3. Poor ground. As more powder is sprayed onto the part, it adheres to the tacky spots and builds up, resulting in uneven coating thickness. 6. A: Powder coating is a method for finishing products through the application of tiny dry paint particles. Turn air settings down so powder/air stream does not blow powder out of corners . I have an issue by TBC. still have the same problem. 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. They are only visible when carefully inspecting the eyepiece in the light. 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. 2002. My brand new Morpheus also had one. Problems / defects in powder coating. The most commonly used method is spraying electrostatically charged particles of pigment and resin onto an electrically grounded piece. Powder coatings can be incredibly resilient, but even the best coatings can take only so much. we have same problem elsewhere too. Because of excessive moisture which gives color during compaction and metal particles black spots appear in tablets after compression. Thanks Claudia Helsum Medellin, Colombia Hello Claudia, Thanks for the question. 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. 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. One of the advantages of powder coating is how good the finished product looks. 6. But the most important is this: Can powder coatings be used past the expiration date given by the supplier? Check out this blog, from our sister brand IFS Coatings, which covers powder application issues, problems and fixes! 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