Explain the types of corrosion in biomaterials?
Explain the types of corrosion in biomaterials?
Objective: Identify types of corrosion and calculate quantities associated with corrosion. Part I: Uniform Corrosion The rate of uniform corrosion can be determined from the following equation, where CPR is the corrosion penetration rate in thickness lost per time. IM CPR = AnpF VA current density over the area which is losing the thickness area over which the material is being lost corrosion current number of electrons involved in the unbalanced oxidation half-reaction (not the number of electrons in the...
A) Can we skip animal studies while evaluating biomaterials? Explain your answer (2pts) B) PLGA, a degradable polymer, has been approved by FDA for drug delivery applications. A bioengineering decides to use PLGA for wound healing bandages. Which methods/stages of biomaterial evaluations does the company need to perform? (2 pts)
3. Explain effects of the oxidizer concentration on the corrosion behaviors of an active metal and also on those of an active-passive metal.
Rank in order of aggressiveness to pitting corrosion the following aqueous electrolytes and explain your choice of ranking Dearated1M NaCl Aerated 2M NaCl
Why are ceramics poor synthetic biomaterials for bone tissue engineering?
1. Tin and zinc can be used to protect mild steel from corrosion. Explain the function of these coatings. Explain how these coatings will behave when scratched to expose the underlying steel.
What is the significance of corrosion rate and how will you incorporate this in structural design? If the surface area of a more noble metal is doubled what will happen to the corrosion rate when connected to a less noble metal? Explain why. Based on the galvanic series Discuss 3 ways in which galvanic corrosion can be prevented. Explain with schematic diagrams.
X-Ray Diffraction (XRD) is a wonderful tool for characterizing biomaterials. Please answer the following questions using the given scenarios. Provide a brief definition of Bragg's Law and describe how it is useful in XRD. b) Please briefly describe how it can be used in Biomaterials Science? c) You observe that X ray diffraction data from a crystalline material displays a prominent peak at 2Theta = 26.0 degrees and 12.93 degrees. Please provide the best guess for what crystal class this...
1. Select one of the following medical devices and research1t, 2nd, and 3'd generation biomaterials that have been used (or are in development). Summarize their use. Sutures Catheters Electrodes Vascular stents Dentures 2. Which type of material is A, B, and C? Explain why.