The zinc coating is firmly bonded to the base metal, and the coating of hot dipped galvanized steel strips are often thicker than electro galvanized steel. I am re-roofing my house. Next to it is a new electro-plated nail. Clevis hangers that are to be used to support piping are available in hot dipped galvanized finish or Electro- Galvanized. Both methods add a protective layer of zinc to the steel. So that leads us to galvanizing, and the million-dollar question: Does galvanized steel rust? 2003. The short answer is, yes, and also no. Use the hand broom to dust off all the rust particles and to clear the area to … Zinc plating looks shiny and pretty, galvanized looks dull. DO NOT ACCEPT THESE. Shall I just go with the flow or can I get something REALLY good which works in a gun? Either electroplating or hot dipping can be used to apply the coating of zinc to steel (and there are other methods as well). The process starts all over again when the sun goes down and the roof starts to cool. How Google uses data when you visit this site. I've also heard stories about inferior galvanized nails that don't hold up and start to rust soon after being installed. 60,000 Q&A topics -- Education, Aloha, & Fun topic 41042 Hot dipped galvanized vs. electrogalvanized 2006. Hot galvanizing is a process whereby zinc dust or chips tumble in a hot drum with cold steel nails. -- a roundtable with a seat for you. How can you tell the difference between different galvanized nails? Like the proverbial sacrificial lamb, the zinc corrodes first, sparing the steel. I love to incorporate tie plates and nail plates that are used in construction, but in most cases this type of steel has a galvanized finish to prevent them from rusting. The products we manufacture are of course used for outdoor applications. Next to it is a new electro-plated nail. Nails can also be mechanically plated with zinc dust. I think electrogalvanizing will be completely worthless in the ocean. Electro galvanized steel … Cheri B., McAlester, OK. DEAR CHERI: Roofing nail guns are mainstream now and accepted by just about every roofing material manufacturer that I know of. This can be done by either electro-galvanizing or hot-dipping. Often they have clumps of zinc on the shaft or the coating of zinc is somewhat uneven on some of the nails. Zinc plated materials are invariably chromate conversion coated to deter white rust. Realize the fastener is the lifeline of the roofing material. "background": "#fff", Hi, Daniel. It prevents rust … })}); Not a lecture hall ! Can I use hot dipped galvanized nails with electro galvanized hangers and visa versa? }, Often, this motion of "washing" the carbonates off … I didn't build the home I live in. Be sure you LOOK AT THE BOX LABELS when the roofers come. Zinc plating (also known as electro-galvanising) is a process where zinc is applied by using a current of electricity. The continuous electrolytic coating process covers the steel surface … Hot Dip Galvanized, Pre-Galvanized and Electro-Galvanized Steel The process where steel is coated with protective corrosion resistant zinc is known as galvanization. Electrogalvanized just means zinc electroplated. The steel … Eventually there will be no more hexavalent chromium in roofing material and there will be no performance difference between yellow and white. If you just see the word *galvanized*, that's not enough. The shingle warranties are very specific about the nail length and you want the right nail so they have enough holding power to resist blowing off by strong winds. Factors that rust and corrode galvanized steel: … Some say today's trivalent chromates are the equal of yesteryear's hexavalent chromates. There is nothing intrinsically questionable about electroplating; it can be an outstanding finish. } IMPORTANT TIP: Be sure your contract with the roofer specifies hot-dipped galvanized nails and pay close attention to the minimum length called for by the shingle manufacturer. It had a heavy-duty architectural shingle on it that was supposed to last forty years, but it started to fail two years ago. I wanted Maze of Peru, Illinois, double-hot dipped galvanized 8D nails (Maze product # R107A)but it turns out that Maze nail must be hand-driven and my roofer uses an Hitachi 75 AG nail coil gun. You can read the saga of my failed asphalt shingle roof - Roofing Ripoff. Galvannealed and galvanized steel are zinc coated at the steel mills and are designed for rust and corrosion resistance. Thanks. CLICK THE PHOTO to discover MORE about these nails. Clean off the rust dust. "background": "#237afc" Galvanized Nails | All the nails have been galvanized. CLICK THE PHOTO to discover MORE about these nails. COATING CHARACTERISTICS The electrogalvanized … Great insight on these questions. Metal products are "galvanized" when a layer of zinc is applied to their outer surface. I want my realistic and gorgeous synthetic slate shingles to stay attached to my roof when any number of punishing nor'easter storms pummel my house with howling gale-force winds. ELECTROGALVANIZED STEEL known as, ... After plating, a uniform application of rust preventative oil or prelube is electrostatically deposited on the strip. Very similar questions have been asked and answered many times on this site. new LazyLoad(); You can read the saga of my failed asphalt shingle roof -, Watch this video to see the steps it takes to. #11 x 1 in. Good luck. The result is a uniform layer of zinc bonded to the steel … } The molten zinc is very hot, usually between 815 - 850 F. Watch this video to see the steps it takes to hot-dip galvanize any steel item. 1/2 inch plywood. Can you provide some insight into the different types of zinc and if one coating is preferred in an outdoor setting. Both steels are passed through a hot dip coating process for rust prevention. You want to see the words 'hot dipped' on the label. Use the … They can also be used to apply insulation board, and felt to wood substrates. When the sun comes out and heats up the roof, the water evaporates. Galvanized steel is also used to create structures like balconies, verandahs, staircases, ladders, walkways, and more. Tiny particles of zinc are dissolved in the electrolytic solution and bond to the surface of the metal. DEAR TIM: I'm getting bids on a new roof and some of the roofers want to use a nail gun to install the shingles. Current flows from the zinc anode, through the solution, and into the metal cathode. This condensation happens on many nights when dew forms on the cool nails because water vapor is present under the shingles. Or is this UAE-manufactured nail a pretty good product? The re-roof will be premium material: 30 # standard felt but then 170 # with 250 # in the valleys and at penetrations. These steel nails are cleaned chemically and then immersed in a vat of molten zinc that … The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful. It's important the guns drive the nails correctly per the written instructions of the shingle manufacturer, so be sure to take the time to read the written installation instructions about this. I don't know the origin of the term but it may have simply been an invention by a marketing manager to attempt to ride the coattails of the more expensive and more durable finish through obfuscation :-). Eventually, even galvanized nails rust, but the process takes longer. Hence the name "yellow zinc". As it cools, the zinc coating and the steel adhere together forming galvanized steel. There should be no compatibility problem between the two finishes but the electroplated parts may not prove very durable in outdoor exposure as the protective zinc coating will only be perhaps a fifth as thick as the hot dipped coating. Electro galvanization is a form of zinc electro plating where a thin layer of zinc is electrically and chemically bonded to steel in order to protect against rust and corrosion. (adsbygoogle = window.adsbygoogle || []).push({}); Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. If the electroplated galvanized finish is damaged or cut the steel edges under the zinc remain exposed, bare and threatened by corrosion. Don't be fooled by the words *hot galvanized* either. The final process is electroplating. I have a feeling I'll be out the next day helping to secure my neighbors' roofs because their roofers chose to use the cheaper nails. The one being held was electro-plated and it’s rusting after just 12 years. Difference between Electrogalvanized Steel and Hot Dip Galvanized Steel. "text": "#237afc" Here's a poor quality video showing the electroplating process. Ted, If you just see the word *galvanized*, that's not enough. The Must for Rust® Stainless Steel Cleaner; Even though these products did not damage the appearance or cause other damage to the coating in the study, you should still test a small area at first to be cautious. But zinc electroplating is no substitute for galvanizing in outdoor exposure. Galvanized Nails | All the nails have been galvanized. elements_selector: "iframe" Galvanization is a zinc coating applied over the top of steel. The most durable versions are hot-dipped … When the nails come out of the molten zinc, they also have an additional coating of pure zinc on them. So that leads us to galvanizing, and the million-dollar question: Does galvanized steel rust? It's fascinating. "popup": { It doesn't take long for the steel nails to rise up to that temperature and when they do, the steel atoms vibrate rapidly and interlock with the zinc atoms creating a zinc-steel alloy that resists rust quite well. An electrically charged anode composed of pure zinc is placed into the solution. The process consists of immersing the steel in a cold zinc “bath” that has an electrical current running through it. Our electro-galvanizer has two types he refers to as yellow zinc and white zinc. This results in the material having a thin coating of protection, but produces a shiny finish fo… There are three other processes of galvanizing nails, but they simply don't offer the level of protection as hot dipping. CLICK HERE to get FREE & FAST BIDS from local roofers who can supply the BEST NAILS. Hi, James. This type of steel product is especially strong and durable, but what really makes it exceptional is its resistance to corrosion. My company works as a manufacturer of custom roofing materials. Galvanization is a zinc coating applied over the top of steel. It prevents rust … "Electro galvanized" means zinc electroplated. window.cookieconsent.initialise({ Zinc doesn't rust and the coating protects the steel from the ravages of water. This is done by immersing steel … Tidal zones and fluid agitation are also important considerations in determining the corrosion protection delivered by galvanized steel. ©1995-2020 finishing.com, Inc., Pine Beach, NJ - About finishing.com - Privacy Policy It's NOT a giant vat of PURE MOLTEN zinc. The short answer is, yes, and also no. n the auto industry today the trivalent chromates are simply dyed yellow and are otherwise exactly equal to the "white". But where you have exposed nails, like the top course of shingles at the peak of the roof, you could ask him to hand drive hot dip galvanized nails. What type of nails would you use when installing shingles on your home and why? The cold steel nails tumble around with the zinc dust, tiny glass beads and a chemical. Electrogalvanization starts by submerging raw metal into an electrolytic solution. If the nails or fasteners rust and fail, the shingles can succumb to gravity and/or be blown away in a moderate breeze. Yes, galvanized steel resistance to rust corrosion depends largely on the type and thickness of the protective galvanized zinc coating, but the type of corrosive environment is also a critical factor. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. Consult'g, Train'g, Software Environmental Compliance. Galvanized steel is regular steel sheets that have been coated in zinc to make them corrosion resistant. They look gorgeous, but they're electroplated. 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