Joining
Adhesives
Adhesive bonding of zinc alloy diecastings is not commonly used as a production technique, however zinc alloys are as easy to bond as other metals and there is nothing to prevent the technique being used if desired. Bonded joints should be designed to develop shear and avoid tensile stresses in the adhesive. The surfaces to be bonded must be suitably treated before the adhesive is applied. Wide-ranging methods of surface pre-treatment exist for the various materials to be bonded. In every case, contaminants such as oil, grease and plasticizers, etc. must be removed with suitable cleaning agents. The best advice is to consult with a reputable adhesive manufacturer concerning the design of joints, the surface preparation required and the most suitable adhesive for the proposed application. A rough guide to the adhesive systems that might be suitable for bonding zinc diecastings to each other or to other materials can be gained from the tables below.
Adhesive |
Substrate |
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Metal |
PS foam |
PU foam |
PVC foam |
Glass |
Wood |
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| Acrylic |
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| Acrylic anaerobic |
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| Cyanoacrylate |
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| Epoxy |
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| Polychloroprene |
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| Nitrile Rubber |
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| Phenol Formaldehyde |
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| Polyamide |
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| Saturated Polyester |
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| Unsaturated Polyester |
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| Polysulfide |
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| Polyurethane |
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| Silicone |
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| Styrene Butadiene Rubber |
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   very good  good suitable |
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| Adhesives | Thermoplastic Substrates | |||||||||
| Acrylic | PA | PC | SP | PE | PP | PS | PTFE | PVC flexible |
PVC rigid |
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| Acrylic |  |
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| Acrylic anaerobic | |
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| Cyanoacrylate | |
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| Epoxy | |
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| Polychloroprene | |
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| Nitrile Rubber | |
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| Phenol Formaldehyde | ||||||||||
| Polyamide | |
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| Saturated Polyester | |
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| Unsaturated Polyester | |
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| Polysulfide | |
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| Polyurethane | |
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| Silicone | |
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| Styrene Butadiene Rubber | |
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| very goodgoodsuitable |
Source : SpecialChem4Adhesives – Adhesion Guide |
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| Adhesives | Thermoset and Rubber Substrates | |||||||
| NR | CR | NBR | PU | Si | UP | Ep | ||
| Acrylic | ||||||||
| Acrylic anaerobic | |
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| Cyanoacrylate | |
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| Epoxy | |
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| Polychloroprene | |
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| Nitrile Rubber | |
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|
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| Phenol Formaldehyde | ||||||||
| Polyamide | ||||||||
| Saturated Polyester | |
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| Unsaturated Polyester | |
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| Polysulfide | |
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| Polyurethane | |
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| Silicone | |
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|
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| Styrene Butadiene Rubber | |
|
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| very goodgoodsuitable |
Source : SpecialChem4Adhesives – Adhesion Guide |
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Reference 2
