![]() ![]() All it takes is a little heat to accelerate the etching action. especially if a bit of heat is added from a heat gun, or Naval jelly rust remover will do a pretty decent job of etching carbon So here are 2 household products that will work almost as well as the textbook recommended etchants. Testing it on a rusted piece of steel angle, and comparing it to Rust-O. and might even throw some red flags to the feds who might think your doing something fishy. Andy Phillips does a complete product review of Loctites Rust Dissolver Naval Jelly. COMPOSITION / INFORMATION ON INGREDIENTS Hazardous Component(s) CAS Number Percentage Phosphoric acid 10 - 30 2-Propanol 67-63-0 1 - 5 Xanthan gum 1 1 - 5 Sulfuric acid 0. ![]() These chemicals are difficult to get and nitric acid is even kinda dangerous. IDH number: 235119 Product name: Loctite® Naval Jelly® Rust Dissolver of 7 3. Where exactly does a welder get nitric acid or sodium hydroxide? Technical papers and textbooks all recommend using nitric acid to etchĬarbon steel or sodium hydroxide to etch aluminum. But thats where all the questions seem to arise because You can cut a weld in a matter of minutes. Even if all you have is an angle grinder with a cutting disc, CuttingĪ tee joint or lap joint is usually no big deal for any fabricator or Products that you can get at any grocery and/or hardware store. Here are a few tips on down and dirty macro-etching using household "Luckily, there are household products are available that will provide a decent macro etch on carbon steel and aluminum " The acids used were downright scary and super expensive. For the most part,Įach alloy group would require a different etch solution. Magnesium alloys like az31b and also mag castings, Titanium alloys likeĬp, 6al4v, and cobalt alloys like haynes 188. Tested welds in 4130 chromoly, all types of stainless steels like 321,Ĥ10, 17-7, a286, etc, all kinds of nickel alloys like inconel 625, 713c,ħ50, and 718, Aluminum alloys like 6061 and cast aluminum like a356, The welding code we worked to was AWS D17.1 and although there were a few guidelines on etch solutions, the code was not specific on type of etch used.just that is was "suitable" to reveal a weld nugget. Thats because I worked in a metallurgical lab for over 5 years. I guess I have macro etched a few thousand welds. Using the macro etch test as part of a quality control program. Welded parts are sometimes sacrificed and sliced, diced, and examined ButĮven in production environments, sometimes a certain percentage of Is used mainly on test welds in proving out a procedure.and not on actual production parts. The macro cross section etch test is what is Loctite Naval Jelly Rust Dissolver, 8 fl. The arc and puddle and correlate the macro etch test results with what Silverwax Rust Off Car Rust Particle Cleaner Spray, 500-mL Silverwax Rust Off Car. The puddle is still in the welders head." "The macro etch test can provide some excellent feedbackĮspecially when it is done immediately after welding while the image of Using the Macro-Etch test in welding training ![]()
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