FAQ

No, Weldbrush machines have a 100% duty cycle, meaning you can work continuously at the highest setting without the unit thermally overheating or switching off.

The Weldbrush 300 has 2 functions: Electrolytic cleaning and marking of stainless steel. The Weldbrush 500 and Weldbrush 700 have 4 functions: Electrolytic cleaning, marking, polishing and plating of stainless steel.

The Weldbrush 300 is the base model and is especially popular for cleaning smaller TIG welds or marking stainless. If you're looking to clean a bigger or heavier weld, our most popular model, the Weldbrush 500, is ideal for removing discolouration non-aggressively and immediately passivates the stainless whilst cleaning. The 700 model is the fastest and most advanced unit within the Weldbrush range, with a high-power output which handles the heaviest work with ease. It will remove discolouration and passivate the stainless in one step, with a weight of only 8.5kg, which makes working on location very easy.

No, passivation and pickling are not the same. Pickling is a chemical process that removes oxides, scale and contaminants from metal surfaces, using very strong acids like nitric or hydrofluoric acid. These strong acids will temporarily remove these contaminants, yet also corrode the stainless due to their strength, leaving it open to more impurities. Passivation, on the other hand, enhances the corrosion resistance of the stainless steel by drawing the chromium back to the surface to form a protective oxide layer. Weldbrush machines will clean and passivate stainless in one movement, ensuring that the weld remains clean and free from future impurities.

Yes, NitroClean NC15 and NC75 weld cleaning fluids, and Anti-Whiting fluid, have been approved by the National Sanitation Foundation (NSF). This means that they have been rigorously tested to ensure that they meet safety and quality standards. They have therefore been deemed safe for use in food-related environments and will not leave harmful residues. Read this article: NSF – NitroClean

Yes, NitroClean fluids have been tested to ensure that they meet all safety standards, especially the NC75 Weld Cleaning Fluid and the NC500 Neutraliser, which have both been nuclear graded.

The NitroClean weld cleaning fluids are made up of diluted, non-toxic, food-safe phosphoric acid. The range includes 3 levels of weld cleaning fluid - NC15, NC50 and NC75. The numbers represent the percentage of phosphoric acid in the solution - 15%, 50% and 75%. The type that you should use depends on the size and heaviness of the welds that you will be cleaning; a bigger job will require a higher percentage fluid such as the NC75. If you're unsure which would be most suitable, don't hesitate to get in touch with us: Phone: +44 1603 263128 Email: support@weldbrushglobal.com

The purpose of the insulating shroud is to protect the brush shorting in confined spaces, enabling effective weld cleaning even in tight corners. The Shroud also restricts the splay of the brush, concentrating the cleaning power into a smaller, and better defined area whilst prolonging the life of the brush.

Neutraliser is a water based substance used directly after weld cleaning to neutralise the acid. It also cleans, de-greases and prevents stains. Use and application (during the weld cleaning process): Wipe away any excess weld cleaning acid fluid residue from your stainless-steel surfaces Apply NC500 fluid on the area where the acid was present Wipe away NC500 with a new clean cloth or paper towel

Anti-whiting fluid has been specifically developed to remove the stubborn white marks which appear 2-3 days post weld cleaning on stainless steel. It must be used as a separate application to the electrolytic weld cleaning if the white marks appear.

For electrolytic marking, you can use any of the Weldbrush models as they all have this function. However, if the main utilisation of your Weldbrush is marking rather than weld cleaning, the most suitable model would be the Weldbrush 300, as this is suited to smaller, lighter jobs.

No, marking does not actually affect the surface of the stainless, as it creates a layer under the stainless' surface electrolytically. Therefore, the stainless will not be open to contaminants and can be wiped clean over and over again without removing the mark.

There are 2 types of stencil that can be used for electrolytic marking. You can buy a brother stencil printer, which works along with a cassette of stencil tape, to print letters, numbers or characters. These are typically single use stencils up to 24mm high. However, if you are wanting a long-life stencil in any size or design, see our bespoke marking stencil, more suited to logos or images, which will print up to 5000 times.