--- product_id: 40824609 title: "Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal" brand: "duda energy" price: "AR$162521" currency: ARS in_stock: true reviews_count: 8 category: "Duda Energy" url: https://www.desertcart.com.ar/products/40824609-duda-energy-1-quart-950ml-85-food-grade-phosphoric-acid store_origin: AR region: Argentina --- # 950ml high-volume industrial strength 85% pure phosphoric acid concentration rust removal & metal etching power Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal **Brand:** duda energy **Price:** AR$162521 **Availability:** ✅ In Stock ## Summary > 🧪 Transform rusted metal into showroom shine—don’t let corrosion steal your style! ## Quick Answers - **What is this?** Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal by duda energy - **How much does it cost?** AR$162521 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/40824609-duda-energy-1-quart-950ml-85-food-grade-phosphoric-acid) ## Best For - duda energy enthusiasts ## Why This Product - Trusted duda energy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Metal Care:** Perfect for restoring, cleaning, and protecting iron, steel, copper, and more with a rust-inhibiting barrier. - • **Safe & Controlled Use:** Food-grade quality ensures safer handling compared to harsher acids—just dilute and apply with gloves. - • **Economical & Efficient:** Concentrated formula lets you dilute to your needs—save money while achieving professional results. - • **Trusted by Pros & DIYers:** Top-rated with 4.8 stars and thousands of users who swear by its powerful yet manageable formula. - • **Industrial-Grade Strength:** 85% food-grade phosphoric acid delivers unmatched rust removal and metal etching performance. ## Overview Duda Energy’s 950ml bottle of 85% food-grade phosphoric acid is a powerhouse rust remover and metal etcher trusted by professionals and enthusiasts alike. Its concentrated formula efficiently dissolves rust and forms a protective barrier, making it ideal for restoring iron, steel, and copper surfaces. Economical and versatile, it’s perfect for industrial, automotive, and DIY metal care projects, delivering high-quality results with safer handling compared to stronger acids. ## Description Chemical Formula: H3PO4 Density: 98g/ml Phosphoric acid is often used to acidify foods and beverages such as carious colas. It provides a tangy and sour taste. We use Phosphoric acid to treat the by-product of biodiesel. after methanol extraction, using phosphoric acid allows a clean separation of the glycerin and soaps. If done correctly, it can yield 90% pure glycerin. May also be used as a rust remover/inhibitor. Dilute to a 25-50% concentration with water and soak rusted metal parts. Over time, rust will remove and the phosphoric acid reacts with the metal to create a rust inhibiting barrier on the metal. Be sure to use gloves! Great for cleaning residue from metals. Review: Quality, works well, and more economical than buying products that include phosphoric acid - 85% is a very strong concentration for phosphoric acid. I used it, after brushing away loose scale, on rusty cast-iron, wrough, iron, and steel plant stands that we have all over the place. I let the acid treatment sit for a few hours to a day to dry, follow that with a light rinse and dry again, then touch up (spray) paint. It takes longer in terms of duration, but the effort level is lower than sanding and brushing down to bare metal, priming, and then painting. I suggest diluting this acid at least 50-50 to start. You can adjust up or down from there the higher, the concentration you use, the longer it will take to dry, and it tends to take on a greasy sort of feel if the concentration is really high. High quality. Review: Great for shining metal, removing tarnish and rust - You put copper in a 20% solution and it turns bright, shiny, and smoousth. Better than it was, new. I've used it on iron rust too as preparation for repainting an old rusty outdoor chair. The rust was too thick to make the steel shiny, but it served the purpose. I'm sure it would work with many other metals. Prior to the invention of carbonation for soda, around 1920's they'd put a tiny drop of it in a soft drink. Its nice enough, though you can see why carbonation has replaced it. It is a real acid so treat it like one! You should dilute this stuff before using. OTOH, if you get some on your skin, you have time to run to the sink and wash it off before you get burned. Safer than, say, nitric acid. And strong acid is fun to try for all sorts of uses in the garage! Do not use w/o adult supervision. ## Features - Inner Tank: Food Grade SUS 304-2B, Outer Tank: Galvanized Steel 0.5 mm thickness - Insulation: high pressure automatic polyurethane foaming layer, Density of 36 kg/m3, R-Value: 12.5 - In Tank Coil: TU1 copper (Red Copper), thickness: 1mm, Length of Coil:66 ft - Water Ports: 3/4" NPT, Coil Ports: 1/2" MPT, T/P Valve/Abode Rod/Drain Port: 3/4", ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06Y1B82TG | | Best Sellers Rank | #45,877 in Automotive ( See Top 100 in Automotive ) #152 in Care Corrosion & Rust Inhibitors #1,644 in Oils & Fluids | | Brand | Duda Energy | | Brand Name | Duda Energy | | Contains Liquid Contents? | Yes | | Customer Reviews | 4.8 out of 5 stars 192 Reviews | | Item Form | Liquid | | Item Volume | 950 Milliliters | | Item Weight | 3.63 Pounds | | Manufacturer | Duda Energy | | Number of Items | 1 | | Scent | Sour | | Special Features | Rust Resistant | | Specific Uses For Product | Drain | | Surface Recommendation | Metal | | UPC | 840194133708 | | Unit Count | 32.1 Fluid Ounces | ## Product Details - **Brand:** Duda Energy - **Item Form:** Liquid - **Item Volume:** 950 Milliliters - **Scent:** Sour - **Specific Uses For Product:** Drain ## Images ![Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal - Image 1](https://m.media-amazon.com/images/I/61cPTRRNZeL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I heard I should use Phosphoric acid to etch grout before applying a sealant. Would this product be good for that?** A: using Phosphoric acid on grout will basically erode or eat away a very fine layer of grout. this opens the pores and gives the grout more bite for the color seal to bond. When grout cures after installation, it gets almost like a skin on the surface from settling, or at least a tighter surface tension. When you hit this with Phosphoric acid, it opens it up and makes it slightly rougher. If you don't color seal, it will make it more prone to staining in the future. It doesn't always need to be done, but it will help the color seal bond. **Q: Can I use this on rusty kitchenware? Like pots and pans,?** A: This can be used as a rust remover. Be sure to use gloves! Great for cleaning residue from metals. **Q: Can I clean the rust from cast iron cooking pans with this? It says it has an inhibitor that remains behind, so I wasn't sure if it would be safe.** A: USE POTATO AND COURSE SALT TO CLEAN CAST IRON. but FIRST !!! PUT IT IN A RED HOT CAMP FIRE COALS AND BURN IT OFF BEST WAY!!! THEN AFTER IT COOLS OFF ENOUGH TO NOT CATCH THE VEG OIL ON FIRE WHEN YOU APPLY IT TO THE CAST IRON. BEST results! you can use charcoal also **Q: I use a bathroom cleaner that contains 3.5% phosphorus acid. Is this product suitable for diluting to 3.5% with water for use as a bathroom cleaner?** A: Yes, diluted phosphoric works well as a lime and hard water deposit remover for concrete, tile, and other stone surfaces. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quality, works well, and more economical than buying products that include phosphoric acid *by N***E on May 12, 2025* 85% is a very strong concentration for phosphoric acid. I used it, after brushing away loose scale, on rusty cast-iron, wrough, iron, and steel plant stands that we have all over the place. I let the acid treatment sit for a few hours to a day to dry, follow that with a light rinse and dry again, then touch up (spray) paint. It takes longer in terms of duration, but the effort level is lower than sanding and brushing down to bare metal, priming, and then painting. I suggest diluting this acid at least 50-50 to start. You can adjust up or down from there the higher, the concentration you use, the longer it will take to dry, and it tends to take on a greasy sort of feel if the concentration is really high. High quality. ### ⭐⭐⭐⭐⭐ Great for shining metal, removing tarnish and rust *by M***K on November 24, 2024* You put copper in a 20% solution and it turns bright, shiny, and smoousth. Better than it was, new. I've used it on iron rust too as preparation for repainting an old rusty outdoor chair. The rust was too thick to make the steel shiny, but it served the purpose. I'm sure it would work with many other metals. Prior to the invention of carbonation for soda, around 1920's they'd put a tiny drop of it in a soft drink. Its nice enough, though you can see why carbonation has replaced it. It is a real acid so treat it like one! You should dilute this stuff before using. OTOH, if you get some on your skin, you have time to run to the sink and wash it off before you get burned. Safer than, say, nitric acid. And strong acid is fun to try for all sorts of uses in the garage! Do not use w/o adult supervision. ### ⭐⭐⭐⭐⭐ Great value and does the job? *by E***N on April 3, 2025* I dilute this to use as a flush for my boat diesel engines and air conditioners on my boat. It saves you a lot of money over buying the pre mixed commercial flushes available. Using phosphoric acid versus things like muriatic acid dissolves the particles., mollusks and helps keep your cooling passages clean. My boat is in a saltwater environment. So I have to flush those air conditioners every two to three months during the summer time or I start getting high pressure alerts on the air conditioners. For another tip, add a small copper fitting snd bromine tablets into the strainers to your engines and air conditioners to help reduce mollusk and algae growth. ## Frequently Bought Together - Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal - Viva Doria 100% Pure Citric Acid, Food Grade, Fine Grain, 2 lb (907 g) - 2 Pack pH Test Strips, 160 Strips pH.1-14 Universal pH Test Paper Litmus Test Paper pH Soap Making Testing Strips for Water Wine Saliva Urine Soil Testing Pet Food and Diet pH Monitoring (Sealed Pack) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/40824609-duda-energy-1-quart-950ml-85-food-grade-phosphoric-acid](https://www.desertcart.com.ar/products/40824609-duda-energy-1-quart-950ml-85-food-grade-phosphoric-acid) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-19*