[vc_row][vc_column][vc_empty_space height=\u201d60px\u201d][vc_single_image image=\u201d1274\u2033 img_size=\u201d1240\u00d7484\u2033 alignment=\u201dcenter\u201d][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column][vc_row_inner el_class=\u201dpage-inner\u201d][vc_column_inner][vc_column_text]<\/p>\n
[\/vc_column_text][vc_column_text]<\/p>\n
[\/vc_column_text][vc_empty_space][vc_column_text]<\/p>\n
Report indicates: Production process can <\/strong> [\/vc_column_text][vc_empty_space][vc_column_text]<\/p>\n \u201cThis material is not coatable. This alloy is not suitable for decorative processing.\u201d \u2013 This is the information that some manufacturers pass on to their customers. Thus, many alloys are initially labeled by producers as unsuitable for anodizing or hard anodizing. Aurolia wanted to demonstrate that in many cases it is indeed possible, focusing on a particularly common material: Alloy AW 7075 in the T6511 temper.<\/p>\n [\/vc_column_text][vc_empty_space][vc_column_text]<\/p>\n So far, the prevailing opinion is that surface coating of AW 7075 is not possible. The component we coated illustrates the issue: Everything is fine on the top and bottom of the part, but there is a dark edge visible on the outside. The question is: how does it occur and how can it be prevented?<\/p>\n [\/vc_column_text][vc_empty_space][\/vc_column_inner][\/vc_row_inner][vc_row_inner el_class=\u201dpage-inner\u201d][vc_column_inner width=\u201d1\/2\u2033][vc_column_text]<\/p>\n [\/vc_column_text][vc_empty_space][vc_column_text]Our suspicion: In this material condition, the reason lies in the manufacturing process itself. In condition T6511, the alloy undergoes stretching. This creates hardenings in the edge area, which are visible as a dark border after coating. The stretching process can also be recognized externally with a trained eye. Discolorations with streak patterns in the longitudinal direction of the workpiece indicate the tensile forces acting on the material during production.[\/vc_column_text][vc_empty_space][vc_column_text]These surface irregularities caused by the stretching process prevent the uniform application of the coating layer. To prove this, we enlisted an expert in metallurgical investigations and failure analyses. Three material disks with diameters of 200, 250, and 300 millimeters were tested. And indeed: During the material hardness test, a difference of over 50 Brinell was observed between the edge and the core\u2014where the losses increase proportionally as the component diameter increases.[\/vc_column_text][\/vc_column_inner][vc_column_inner el_class=\u201dtext-rechts\u201d width=\u201d1\/2\u2033][vc_column_text]<\/p>\n [\/vc_column_text][vc_empty_space height=\u201d90px\u201d][vc_column_text]To demonstrate that the heterogeneous surface structure caused by stretching is responsible for the poor coating results, we conducted another experiment in which we removed the hardened edge area of the workpiece. Since EN AW 7075 is very machinable, this is also not a problem for most manufacturers. And this test confirmed our suspicion: When the hardening in the edge zone is removed, the alloy can be coated very well and evenly.[\/vc_column_text][vc_empty_space][vc_column_text]Appraiser Dipl.-Ing. Martin Hoffmann attests, \u2018Successful coating of this material under typical coating conditions is only possible with sufficient machining allowance to completely remove the deposited structure zone, as indicated by the results of the conducted examinations.\u2019 So, the solution is quite simple: If manufacturers provide the workpiece with some machining allowance and machine off the hardened edge, the previously considered unsuitable for coating alloy AW7075 in the T6511 temper can be excellently and evenly coated.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner el_class=\u201dpage-inner\u201d][vc_column_inner width=\u201d1\/2\u2033][vc_empty_space][vc_single_image image=\u201d1277\u2033 img_size=\u201d575\u00d7430\u2033][\/vc_column_inner][vc_column_inner el_class=\u201dtext-rechts\u201d width=\u201d1\/2\u2033][vc_empty_space][vc_single_image image=\u201d1278\u2033 img_size=\u201dlarge\u201d][\/vc_column_inner][\/vc_row_inner][vc_row_inner el_class=\u201dpage-inner\u201d][vc_column_inner][vc_empty_space][vc_column_text]So, the next time you hear from a manufacturer that the desired material unfortunately cannot be coated, feel free to contact the surface professionals at Aurolia. Together with our experts, a very good solution can often be found even for the difficult cases.[\/vc_column_text][vc_empty_space][vc_column_text]<\/p>\n Contact us now and together let\u2019s find your perfect custom coating solution!<\/strong><\/p>\n [\/vc_column_text][vc_empty_space][vc_btn title=\u201dContact\u201d align=\u201dcenter\u201d link=\u201durl:https%3A%2F%2Fwww.aurolia.de%2Fen%2Fkontakt%2F|title:Kontakt\u201d el_class=\u201dbtn-2\u2033][vc_empty_space][\/vc_column_inner][\/vc_row_inner][vc_row_inner el_class=\u201dpage-inner\u201d][vc_column_inner width=\u201d1\/2\u2033][vc_btn title=\u201dback\u201d link=\u201durl:https%3A%2F%2Fwww.aurolia.de%2Fen%2F|title:Home\u201d el_class=\u201dbtn-3\u2033][\/vc_column_inner][vc_column_inner width=\u201d1\/2\u2033][vc_btn title=\u201dfurther\u201d align=\u201dright\u201d link=\u201durl:https%3A%2F%2Fwww.aurolia.de%2Fen%2Fflusssaeurefrei-sichere-und-bessere-reinigung-bei-aurolia%2F|title:Erfolgsstorie-2\u2033 el_class=\u201dbtn-3\u2033][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":" [vc_row][vc_column][vc_empty_space height=\u201d60px\u201d][vc_single_image image=\u201d1274\u2033 img_size=\u201d1240\u00d7484\u2033 alignment=\u201dcenter\u201d][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column][vc_row_inner el_class=\u201dpage-inner\u201d][vc_column_inner][vc_column_text] Aurolia Success Stories [\/vc_column_text][vc_column_text] Aurolia enables surface finishing. [\/vc_column_text][vc_empty_space][vc_column_text] Report indicates: Production process can hinder the finishing of alloy AW 7075. [\/vc_column_text][vc_empty_space][vc_column_text] \u201cThis material is not coatable. This alloy is not suitable for decorative processing.\u201d \u2013 This is the information that some manufacturers pass on to their customers. Thus,… Continue reading Erfolgsstorie-1<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-748","page","type-page","status-publish","hentry","entry"],"yoast_head":"\n
\nhinder the finishing of alloy AW 7075.<\/strong><\/p>\nThe stretching process prevents
\nuniform coating application.<\/h2>\nMachining the edge
\nenables coating.<\/h2>\n