It really depends on your bowl and your part. 6 years ago This is where the process needs to move outside for sure. For one thing, the source "ehow" article (which links to another site) is to say the least questionable ("Jane Smith" - seriously?!?!) I just wanted to mention that this may seem like a hardening process that would lead to the piece becoming brittle but it wont.Two reasons for this....1. I laid out two so that I could separate finished from unfinished. Another method suggested mixing vinegar and hydrogen peroxide. Did you use fresh motor oil? well galvanized metal is nothing more than zinc coated steel. Add one part black-oxide concentrate to nine parts distilled water in a large plastic bucket. Both black steel pipe and galvanized pipe are made of steel, however, galvanized pipe has a zinc coating while black pipe does not. But I feel like it should be mentioned that you MUST wipe off any oil and reheat the metal after you have repeatedly quenched it, or it will become brittle. ), 7 years ago Scraping old paint from galvanized steel is quick and easy with a plastic or wooden scraper. The hot-dip process consists of submerging the carbon steel into a molten zinc bath (approximately 680 degrees Fahrenheit). Then it will need tempering as well which adds a quality known as toughness or notch toughness to the blade. For example, one method suggested mixing vinegar and bleach together. A. Hi, Brett. Moisture is highly corrosive to most metals including steel and zinc. on Step 2. NEVER use water or a water based for extinguisher. Tried this out this weekend using Canola oil, since it's a branding iron that will touch food and I didn't want to mess with motor oil. References: Early this morning it … Galvanized fittings also cost more than the fittings used on black steel … As a result, black steel pipes are more commonly used to transport substances like oil and gas rather than water. Products known as black oxide or steel-blackening kits allow you to change the color of galvanized pipe at home. Free Technical Support and Product Advice at (323) 262-8108 or Toll Free Outside CA (800) 282-3533 This is pretty slick. We wanted it to look aged. The solution can be used on cast iron and mild low-carbon steel. I have annotated them for clarification. 4 years ago. I would filter the used oil first to get rid of any larger particles. The paint and the zinc in the steel are not harmonious. Comparing costs of black steel pipes and galvanized steel pipes In general, black steel pipes are cheaper than galvanized pipes. lay out rags to place your parts. 4. light torch and adjust flame to something manageable Some kits include rubber gloves and others do not. Recycling steel … Some kits include tongs while others do not. Thanks for the recommendation (which you gave me at TechShop... should have told me you were the author of the Instructable! heavy leather gloves, jacket (welding attire works great), and safety glasses, metal or glass bowl (preferably one you don't care about). Especially when there is a much simpler, safer, and reliable method: use an oven. Step 1: Prepare Metal Using acetone and a clean rag, wipe off excess oil, rust, etc off of your metal parts. 5. submerse a part completely in the oil and retrieve with pliers Black steel is even less expensive than galvanized steel because it isn't coated or alloyed. do not be alarmed unless flames grow Black steel pipes, galvanized steel pipes and welded steel pipe are all widely used steel pipes. You might also use steel wool or a scotch brite if you need a little more abrasion. If you want an even finish, you should drop and retrieve each time Once contaminated with the black oxide, the tongs are not safe to use with food. This would probably have been a good time to be wearing gloves. shouldn't hurt to try it at least on a bit of scrap! Cooling the metal stops the galvanization reaction, which continues as long as the steel is the same temperature it was while immersed in the zinc bath. Since the green pail was still usable, but not the galvanized metal I wanted, I decided to paint it to look like it was. 11. wipe off with clean dry rag Re: Mixing galvanized steel and black steel pipe? This has been a method of protecting Ferrous metals for years. Actually ended up working really well using a plain propane torch (didn't even get the steel red hot). Put on rubber gloves to protect your skin from making contact with the black oxide. There are two ways to blacken galvanized pipe: Remove or chemically alter the layer of zinc. Acetone is a pretty nasty solvent. 9. repeat process 2 or three times per part to achieve desired finish All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. The secret to painting galvanized steel is white vinegar. I don't know if it's possible to get a nice mottled look on galvanized steel quickly, but you could test ferric chloride or patina made for zinc => Regards, Ted Mooney, P.E. I know this is an old post, and I hesitated to comment. This zinc oxide coating serves as a critical barrier that helps to protect the underlying steel from corrosion, oxidation and other damage from the elements. To paint galvanized steel, start by applying a latex-based primer evenly across the surface to stop the paint from soaking into it. Let the primer dry completely, which should take anywhere from 2-6 hours, so your paint will stick properly. In your intro, you mention doing this work outside in a safe area, and that "asphalt or concrete are ideal--a tarp probably won't cut it" I would caution against diong this over asphalt.....asphalt is a petroleum based mixture and can be damaged by the heat of the burning oil that my drip on it. Per the instructions of heating it to a reddish color, the temperature reached at a dull red is low enough that this is more of a tempering process than anything else. Author: Dunbar (KY) I see this mixing of materials all the time in gas lines in my area. I am putting galvanized steel on my entryway ceiling. (1968) My Chemistry teacher showed me how to silver-plate a copper penny without heat or electricity. Thank you. 2 years ago 2. I am the founder & owner of STEEL F/X® Patinas, which began officially in the fall of 2006. The most common method of zinc coating is the hot-dip process. Galvanized metal is usually zink or iron with a coating of steal sealed over it to prevent it from rusting. (I know, I'm a professional knifemaker and also make a lot of my own tooling - and put extremely hot (1,600°F) steel objects in oil regularly - and can still count to 10 on my hands, and see with both eyes.) Plastic bucket (if not supplied with the kit), Stainless steel tongs not coated with rubber. This is a great instructable but I must point out that it would be far better to have some sand to extinguish any fire or soak any spilt oil. old. 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