Cleaning Methods for Weld Preparation 

Here at Fereday Cylinder, by making use of our innovative Trumpf nibbling machines, we are able to cut weld preps onto plates up to the size of 40mm. However, there’s a lot more to find out when it comes to weld preparation, and this will be the focus of this piece today.


Prior to any welding, whether by gas fusion or arc welding, the weld edges must be cleaned. If there is any remnants of oil, wax layers, paint or scale, these must be removed. The welding points should be metallically clean in order for the welds to last. In order to clean the welding points, lathing and other mechanical methods are appropriate in order to carry out this preparation. It is worth noting that if weld
preparation is carried out on aluminium, it is vital to make sure that the abrasive has been approved or recommended for this material by the manufacturer. Read on to find out more methods for cleaning in order to complete welding preparation.

Sand Blasting

Another possible method for weld preparation. In order to do this, you must consider that the blasting materials is suitable for the material being welded. Again, you can find this information from the
manufacturers. Types of blasting material include grit or shot.


If you use milling as a method for weld preparation, you will see a very clean edge as a result of this. At this point, it is also possible to machine chamfers in various sizes and angles on the weld edge, making it simpler for the welder to join assemblies. Milling works by cutting and shaping the metal using a rotating tool. You should also be careful when using an angle grinder with a flap disco as it will removal a lot of material in the process so should not be used on thin sheet metal or it may decrease the material’s strength.

Manual Cleaning

If you prefer to carry out the cleaning preparation process manually, you should make sure only to use stainless steel brushes. If you use other types of brushes, there is a risk that inclusions of carbon steel may occur in the parent metal. The diameter of the wire on these brushes should be between 0.1 and 0.25mm. If the wires are thicker than this then it may result in deep scratches on the surface or edge to be welded, whilst if they are too thin then they can smear the dirt rather than clean it.

Contact Us

If you would like to find out more about weld preparation, please complete our contact form or email us at Alternatively, you can also speak to us directly by calling us on 01384 213 444. We will be pleased to provide you with a quote or answer any questions you may have for us.

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