In its effort to reach grater sustainability and cost-efficiency in metal pretreatment and replace hexavalent chromium (Cr VI) compounds in metal surface treatment, Henkel has been optimizing its conversion coating solutions for aluminum processors. Today, the company offers a rich portfolio of conversion products. Moreover, it has been focusing on reducing the complexity of conversion processes by minimizing the number of required process steps. The highlights of the latest developments in this area can be summed up in three specific products: Bonderite C-IC 65001, Bonderite M-NT 2040 R9 and Bonderite M-NT 65000, developed especially for a broad range of new aluminum applications in industries from aerospace, automotive and railways to architectural, agriculture, furniture and lighting.
An increasing number of customers were seeking an additional suitable one-component alternative enabling an HSE enhanced process at comparable performance. Henkel’s Bonderite C-IC 65001 delivers the best of both worlds: a non-toxic labelled one-component product with the same bath build-up properties, treatment time and etch rate as the already existing products, thus providing a direct drop-in solution. Apart from minimizing the risks for operators and facilitating both transportation and storage, the formulation offers high and stable etch rates even with dissolved aluminum up to 6 g/L.
Bonderite M-NT 2040 R9 is Henkel’s immediate chromium-free and non-toxic labeled conversion treatment alternative to yellow and green chromating processes, since conversions to this product require no modification in the pretreatment line. In addition, as it allows users to combine etching, degreasing and passivation in one process step, it minimizes the required number of baths and rinsing steps as well as the length of pretreatment. In some cases, the typical de-ionized rinse before the conversion step can be replaced with a conventional tap water rinse.
Originally developed for aluminum alloy components for the aerospace industry, Bonderite M-NT 65000 offers a convenient, efficient and sustainable alternative to conventional chromium VI based aluminum surface treatment processes. It can be used with standard equipment, requires no filtration and no post-treatment. In addition to outstanding corrosion protection results, it also creates a visible conversion layer to facilitate quality checks.