1) Can You Fix This?
The most important question is: can we ignore fixing this? There are times when we are frequently interrogated if we can resolve the issues like scratches, stains, and blemishes on products which we are anodizing?
As we start this discussion, there are some effective steps which we normally take for some existing problems. The most constructive perspective, though, is to have your products be ready before they even reach the level of the anodizer. Keeping this in mind, let us briefly discuss the operations and processes required to be considered when you are anodizing the aluminum.
2) Pre-Treatments
There are certain levels of pre-treatment that the anodizer can think of in advance to the final finish. However, these pre-treatments normally come with a few risks of their own. Some of the most regular processes to create the aluminum substrate for anodizing consist of a few things. They are:
• Bright dip anodizing
• Soaping
• De-oxidation
• Etching
It is crucial to understand that bright dip and etching are metal detaching chemistries and will always execute part size, but may play a positive role in eradicating or hiding the offending condition prior to the finishing. This can never be the call of the finish as to watch to do and achieve in accordance with the end product. The product should always be anodized, and ready when coming.
3) Product Preparation
In accordance with the products being sent to the finishing house, they at times surpass through many different kinds of operations. These operations are not restricted to machining, bead blasting, heat treating, polishing, tumbling, grinding, and many more etc. In addition to this, parts are at times preserved in wet conditions, and then later onwards exposed to certain elements, or keep machine oils and cutting that can blemish.
The result to the products of the operations in advance and maintaining can be oxidation or blemishing in the scratches, aluminum, uneven bead blasting, embedded fingerprints, machine marks, wheel marks in the extrusions, tooling lines, and many more to name a few.
Since the process of bio dip anodizing is normally the last step in the entire production cycle, the consumers demand that the anodizing houses can resolve these problems. The great amount of damage to the product to the above-mentioned conditions is normally not considered at all until it happens.
4) Tolerance Deliberations
The deliberations are not your problem, preparation of chemical can eradicate anywhere from a few ten-thousandths of an inch to many thousandths. This is significantly depended on the kind of preparation is used and how much the material should be removed to eliminate the defect.
The issues of deliberation should always be considered when thinking about the anodizer and if it can separate the conditions causing the concern. If the scratches are deep, the best possible thing to do is to eliminate the condition and it will surely tarnish the final tolerances and may even start by creating other conditions like exposure, grain boundary, Aluminum extrusion imperfections, and others.
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