The pre-treatment of aluminium surfaces in alkaline E6 long-term pickling processes produces fine-matt, very decorative surfaces. However, this appearance is negatively affected by the accumulation of certain contaminants to such an extent that the anodised product is often not saleable and has to be reworked. In addition to the known ...

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Sometimes, at the start of production, you observe the following phenomenon on the cleaning bath at the beginning of the week: An oil-like, yellowish or brownish layer floats on the surface of the cleaning bath and you wonder what it is. At first, one will suspect oil residues that have ...

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Everyone knows them, at least since electric mobility became the topic of our century: The lithium-ion battery. Thanks to its high capacity, chargeability and service life, it is generally regarded as the battery for electrical technology. But there is one element that seems even more suitable: aluminium. Yes, that’s right. ...

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We build on trust, in all aspects of our business. And an important part of trust is the high minimum level of quality. Therefore, we are particularly pleased that the approval for our product Alupolish has been further extended. The approval test according to approval RAL-GZ 632 and the GRM ...

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At the moment, aluminium prices are at a continuing high. A tonne of aluminium currently costs over 2,400 dollars. This is an increase of about 20% compared to the previous year. In addition to Chinese attempts to introduce aluminium to the market, the goal of lowering emissions is also leading ...

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Due to the pandemic situation and the insecurity about possible restrictions, the organiser of the ALUMINIUM Fair Trade decided to not hold the world’s leading trade fair for aluminium. Instead, there will be an ALUMINIUM Business Summit on 28th and 29th September 2021, at which the most important topics of ...

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The solution to a problem in chemical pre-treatment during anodising can also be simple sometimes. For example, the level of the bath can be significant for good or insufficient colouring, if we look at electrolytic colouring with tin salts. Ideally, the electrolytic tin dye bath (e.g. Alficolor 677) produces homogeneous ...

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The best pretreatment is ineffective if the rinsing technique is inadequate. Often the process baths are elaborately maintained and analysed, while the equally important rinsing baths are neglected.Therefore, during chemical pretreatment, the attention should always be paid to the condition of the rinses between the process baths and, in particular, ...

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In the direct current (DC) sulphuric acid anodisation process, an artificial oxide layer is created on the treated aluminium. This layer has special characteristics. One of these is its porosity. The porosity of the layer enables, for example, the incorporation of coloured pigments and is thus an important criterion for ...

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For the decorative matting of aluminium surfaces in the anodizing process, alkaline pickling processes are predominantly used in Europe. These special etching bathes are applied in accordance with the DIN 17611 standard for “E6” surface treatment. Such etching bathes are also referred to “E6 etching bathes “. With correct bath ...

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