Die casting magnesium enclosure-surface preparation
Die casting magnesium enclosure-surface preparation
(OP)
Hi,
I preparing the drawing for a magnesium die casting enclosure of a medical hand held device. I know that the part will be made overseas and I would like to specify a set of standards to be followed to ensure a good quality of the product and to have some control over the chemicals and operations applied to the part. My intention is to have some notes as following:
1. Enclosure material: AZ91D
2. Cast treatment: machining, deburring, grinding, bead blasting
3. Cleaning (alkaline)
4. Activation (acid pickling)
5. Conversion coating (chrome free)
6. Finish painted (not decided yet what type of paint)
7. All processes to be RoHS complient.
Please let me know what standards should be specifed for these operations or if you work for a die casting company what notes you would like to see in the drawing.
I appreciate any feedback from you.
Thank you,
Dan Pop
I preparing the drawing for a magnesium die casting enclosure of a medical hand held device. I know that the part will be made overseas and I would like to specify a set of standards to be followed to ensure a good quality of the product and to have some control over the chemicals and operations applied to the part. My intention is to have some notes as following:
1. Enclosure material: AZ91D
2. Cast treatment: machining, deburring, grinding, bead blasting
3. Cleaning (alkaline)
4. Activation (acid pickling)
5. Conversion coating (chrome free)
6. Finish painted (not decided yet what type of paint)
7. All processes to be RoHS complient.
Please let me know what standards should be specifed for these operations or if you work for a die casting company what notes you would like to see in the drawing.
I appreciate any feedback from you.
Thank you,
Dan Pop





RE: Die casting magnesium enclosure-surface preparation
RE: Die casting magnesium enclosure-surface preparation
RE: Die casting magnesium enclosure-surface preparation
Could anyone suggest a surface treatment for enclosure mentioned above? The hand held unit will be used in dental offices and will be exposed to heavy CaviWipes cleaning.
Thanks,
Dan
RE: Die casting magnesium enclosure-surface preparation
Topcoat: epoxy powdercoat, try Interpon/Akzo Nobel
RE: Die casting magnesium enclosure-surface preparation
Dan
RE: Die casting magnesium enclosure-surface preparation
Also a baked finish (enamel or similar ceramic) may take long-term disinfectant cleaning best... however any mag alloy will prove "difficult".
Suggest using high purity control alloy AZ91E per ASTM B403 or equiv for maximum corrosion resistance.
Regards, Wil Taylor
RE: Die casting magnesium enclosure-surface preparation