The etch process is designed to dissolve a thin layer on the surface of the aluminum to develop a smooth uniform finish. Linetec made the change to its etch chemistry from traditional caustic etch to a more eco-friendly etch process, referred to acid etch.
Etching is a vital step during the anodize process
These images depict conventional anodize samples on the bottom and eco-friendly (acid etch) anodize samples on the top.
Neither the conventional etch process nor the eco-friendly etch process removes irregularities in the aluminum, but the eco-friendly etch does a much better job of concealing them.
Environmental Benefits of Acid Etch Process
- Environmental Benefits of Acid Etch Process Secondary billet can be successfully anodized, contributing to recycled material content by green building programs
- The eco-friendly etch process reduces landfill waste by 75-80%
- The process byproducts from the etching process are recyclable
- Reduction in energy used for waste treatment process
Eco-Friendly anodize include
Linetec’s Anodize process offers a superior aesthetic finish and a more environmentally-friendly product with this acid etch technology.
The eco-friendly etch process creates an aesthetically appealing “frostier” appearance that helps hide small defects, such as die lines, flow lines, minor corrosion and scratches, that may occur on the aluminum surface of architectural products. Although neither conventional caustic nor acid etch removes all irregularities in the aluminum, acid etch does a better job of concealing them. This gives the material a better aesthetic finish on both primary and secondary (recycled) billet.
Linetec’s eco-friendly anodize process meets or exceeds all AAMA 611 specifications. Standard warranty of 5 years with optional extended 10 year warranty available.
BENEFIts of anodize ACID-ETCH include
SUPERIOR AESTHETIC FINISH
Superior aesthetic finish – produces a frostier matte (most evident in clear anodize).
Hides small defects on the aluminum surface such as die lines, flow lines, minor corrosion and scratches.
Low gloss level reduces glare in bright sunlight. Gloss level reading is reduced from 16 to 24 with conventional anodize, down to a gloss level of four.
Aluminum removed during the etching process is reduced by 80%, down to 0.5 mils, allowing for a more consistent extrusion tolerance between paint and anodize.
The etch process has the viscosity of water and will not collect in the small recesses of aluminum extrusions or narrow aluminum tubes, enhancing the durability and lifecycles of the finished product.
Conventional anodized material can be converted to eco-friendly anodize and vise versa.
Specify Eco-Friendly Anodize – M10C21A44
Photo credits: Loewen, Major Industries
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