ISO 17212-2012 pdf free download.Structural adhesives – Guidelines for the surface preparation of metals and plastics prior to adhesive bonding.
Some at the methods given below eniØoy dangerous tedtniQues. malarial. and proprietary chemcab. It is essential. theretoce, that Ihe supøer’s instructione be tollowed, health and salety data studied, and appropreib safety proceckires established.
Waste and spent matertals shall be disposed of en accordance with national Ieglslrve recilrements tlwough the services of an authorized disposal organization — whose advice shall always be souit
WARNING — When making up solutions:
— NEVER POUR WATER INTO ACID.
— ALWAYS ADD ACID IN A SLOW, STEADY STREAM TO A STIRRED SOLUT)ON.
An exothermic reaction can beet the resulting mixture. Ii this occurs, contamination hazards will be
Infenalfiod. TAKE GREAT CARE.
5 InitIal pi-eparatlve techniques
5.1 General
When safety-crttecal Mrucbires we besig bonded, optimum treatment is always necessary. This requwes the use of prorwiate Iechnerp.ies to both clean and modify tIe surface, wsch itself can be either an Inorganic or an organic coating — or even a combination of both By contraSt, when pints we ority to be lightly or noininaly ded, the use of aithesives capable of dlssolwng light oils can dow nwllmal, or even no, surface preparation The manufacti,er’s advice shall always be sought
5.2 Handling, cleaning and storing
5.2.1 Handweg
Component areas which are to be bonded shall be herded as little as possible pior to preparation. After prepareton, such areas should not be handled dlrecly at aS ltowever, it the Is unavoidabl. then clan, hnl4re cotton or nylon gloves stieS be n.
512 Cleaning
Remove oji- and greave-based residues using aquis materials if poasible Non-.onic oetergents give goon results. Proprietary alkaline cleaners are particularly good for metals because not ordy can they remove hydrocarbons but tie more aggressIve, stronger, versions can also remove metallic soaps and sali. However. the tatter shal not be used on aiirwLr’e, arid care shall be taken to eneure that the metal is not exposed to cleaners based on sodium hydroxide or other alkaline mateflals Some proprietary nsxtures we used hot whihi others utiize either anoctic or a cathodic currantS. Whichever cleaning agent is used. cononents shal always be rinsed thoroughly and died en a stream of warm, dean, dry. et4ree arr for about 10 mm at 60 C.
If solvents need to be used to remove identification marks, or petit, then propan-2-ol shal be used wherever posslbb Allemativety, use acitone, methyl ethyl k.Ione or another permitted solvent se. Clause 4). Solvents cart severely damage some thermoplastic materuts by either dissolving them or Eiitiatitlg stress cracking. Polycarbonab. polyf methyl methacrytlee) and acrytonitrite-butadiene-styrene-based ptashca are particularly suscepatfe en this latter regard.ISO 17212 pdf download.