Metal Alloy Research Made Simple Magnesium Based

　　Academia

　　Magnesium based alloys are common place within science and tech-

　　nology. However, biodegradability and other alloy properties now open

　　new applications. Degradation tests can easily be performed using the

　　METTLER TOLEDO DL50 titrator to maintain the pH value of testing liquids

　　during the week-long tests necessary.

　　Metal Alloy Research

　　Made Simple

　　Magnesium Based Alloys

　　Mg based alloys are widely used within the

　　manufacture of aircraft, car and machin-

　　ery parts. The main advantages of these

　　alloys include being light weight, having

　　good founding properties and being easy

　　to machine. The rate of the biodegrada-

　　tion is tested in vitro by the Metal Phys-

　　ics group of the Swiss Federal Institute

　　of Technology’s (ETH) lab

　　oratories in

　　Zurich, Switzerland. Disks of the sample

　　alloys are immersed in a simulated body

　　fluid at 37°C. The loss of weight after

　　1 week is then measured.

　　Constant pH Value

　　A DL50 titrator, with its pH stating func-

　　tion, keeps the pH value of the simulated

　　body fluid constant at 7.40. If the pH value

　　increases, the degradation of Mg is in-

　　hibited. An organic acid was selected as

　　titrant as hydrochloric acid reacts directly

　　with magnesium. The consumption of the

　　titrant as a function of time in addition

　　to the formation of the hydrogen gas

　　indicates the course of the degradation

　　rate. All data is collected electronically

　　via the LabX software for documentation

　　purposes and for further evaluations. "We

　　really value the simple operation offered

　　by LabX, the clear PC screen presentation

　　and the automatic data transfer", explains

　　a scientist from the Metal Physics lab. All

　　the operators commented on the problem-

　　free setup of the DL50 and its ease of use.

　　Find out more about the successor to the

　　DL50, the Excellence T50 Titrator at:

　　`

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