This website uses cookies to ensure you have the best experience. Learn more

Materials Science Essay

590 words - 3 pages

Corrosion is an unavoidable problem that occurs almost everywhere. It can happen when a solid interacts with its environment. Corrosion oxidises metals back to some natural ore. Despite not all corrosion is unwanted, corrosion has become a growing economic concern. Taking an example of what happens in USA, corrosion of metals costs the economy almost $300 billion per year at current prices, which translates to 3-4% of GDP. Besides the economic concern, corrosion may adversely affect the environment. Worse than all those mentioned, corrosion can cause unexpected death from corrosion-related accidents. For example, the sudden collapse caused by corrosion fatigue of the Silver Bridge over the Ohio River in 1967 cost 46 lives on top of the needless-to-say millions of dollars material loss. Therefore, the benefits brought about by corrosion are outweighed by its detriments. The fact is, about 33% of these costs could be diminished by using ...view middle of the document...

However, these two processes affect the environment adversely. As alternatives, coating layers can be introduced to metal samples. Coatings can be done with or without electricity. If electricity is involved, the process is called electroplating. It is done by immersing the sample that is going to be coated together with an anode of the coating metal in an electrolyte containing salts of the metal to be plated. The other coating method that relies on chemical reaction instead of the surge of current is termed electroless plating.
One popular electroless plating is the electroless nickel (EN) plating process. This process is first invented in 1940s by Brennel and Riddell. The coating will be deposited on a metal/ alloy surface submerged in an aqueous solution containing nickel ions, complexing and buffering agents, a reducing agent, and stabilizers. One advantage of using electroless plating is that a uniform thickness can be obtained. Also, the longer the metal is submerged, the thicker is the coating deposition. EN plating does not only improve corrosion- and wear-resistance of a material, but also its hardness, lubricity, solderability, bondability, uniformity of deposit regardless of geometries and nonmagnetic properties of high-phosporous nickel alloy. As such, the demand for electroless plating has burgeoned over the past decades, even though it is considered a relatively new process and the relatively more expensive cost than electroplating. It has a really broad range of applications too – to name a few: automotive, aircraft, chemical equipment, railroad, electrical motors, printing rolls, oil wells and mining, molds, military, valves, textile and electronics.
The chemical reactions that occur when using sodium hypophosphite as the reducing agent in electroless nickel plating are portrayed by the four equations below:
1. H2PO2- + H2O HPO32- + 2H + H+
2. Ni2+ + 2H Ni + 2H+
3. 2H H2
4. H2PO2- + H P + OH- + H2O
Sometimes, materials are coated not only with EN solution, but also with EN composite (i.e. EN solution mixed with dispersant and ceramic composite powder such as TiB2, TiC or ZrB2). These composite powders increases hardness, roughness of the materials and increase their corrosion- and wear-resistance.

Other assignments on Materials Science

Shoe Polish Essay

432 words - 2 pages Used Cartons, Plastics and Sachets as an Additive of the Production of Hollow Blocks A Research Paper Presented to Cebu City National Science Highschool Salvador St. Labangon, Cebu City In partial fulfillment Of the requirements of Gen Sci Subject Submitted by: Bacatan, Niña Faye U. Bajarias, Therese Grace S. Dinglasa, Ericka Minette M. August 2014 Table of Contents: Chapter 1 Introduction Background of the Study

Computer Management System Essay

430 words - 2 pages Name: |Period: | | |Date: | | SCIENCE FAIR: PROPOSAL OUTLINE This outline will help you organize your science fair proposal. Use the attached report as an example. You will use this outline to write your proposal in paragraph form. |1. |TITLE: Write a sentence that connects the independent


697 words - 3 pages expensive.) Materials and Procedures (requirements) Open up your question and hypothesis- should be saved on your computer. Make a new section call it Materials & Procedures -include a typed list of all the materials that you will need to complete your project. Please include only one item per line. After you have typed the materials that are needed, you need to type the procedures. The procedures are step by step instructions on how you will

Pupils Attitudes Toward Science: Its Influence To Academic Performance

1383 words - 6 pages of teachers and the learners towards the subjects, pedagogy, teaching and learning materials and resources as well as mastery of content. The Working Group on Mathematics and Science Education (WGMSE) holds firmly that teachers are a greater asset in education for dynamic evolution (Ministry of Education, 2007; SMASSE, 2001). Before the start of Phase 2, it was agreed, under the chairmanship of the Permanent Secretary of Education (PS) that JICA

Winkkler's Method

2220 words - 9 pages UTAR FHSC1114 Physical Chemistry Trimester 1 Topic 1: Introductory to laboratory safety and apparatus ________________________________________________________________________ 1. Materials requirement There are various materials that students must bring along during laboratory session. Students will be asked to leave the laboratory if they fail to bring the items listed.  Laboratory manual  Appropriate PPE (Personal Protective

Floating Boat

534 words - 3 pages Isael Tore Science Experiment Rubber-Band Powered Altoids Boat 5th Grade Teacher: Mrs. Gainous Problem The purpose of my project was to find out which rubber-band powered Altoids boat would work better? My project consisted of two boats one small boat and one large boat. Hypothesis I predict that the small boat will propel the longest time. My prediction is that the small boat will

Nanogene Case

430 words - 2 pages Nanogene case: People: Will Tompkins: 41 year old biochemistry PhD had quit his job at Eastern Institute of Technology’s Advanced Materials Science Lab and become CEO of NannoGene Technology. Paige Miller: a 1995 Harvard Business School graduate who had been doing some consulting for NanoGene. She has considerable experience in the life sciences industry as VP of Operations at a successful biotech company. Six year experience in biotech


345 words - 2 pages Science Classroom Rules and Procedures Classroom Rules: 1. Raise your hand and wait to be called on to speak. 2. Keep your hands to yourself and remain seated. 3. Listen to the teacher and follow directions the first time given. 4. Bring books and all necessary items to class. 5. Be respectful to your teacher, other students, and yourself. Classroom Procedures: 1. Students are in their


503 words - 3 pages Recycling Recycling is a commonly heard term specially in science classes, it means to dispose of materials the correct way so it can be reused. Although it is commonly well known many people ignore the fact that in order for it to work they actually need to regularly participate in the recycling process by disposing of their waste the correct way. If every were to do this the term “recycle” would not be seen as the cli·ché term we hear in

Reaction Paper About Media

2421 words - 10 pages , Cotabato Madame: It is my pleasure and honor to inform you that the undersigned had made a Science Intervention Material (SIM) which is indeed a big help in teaching the lessons because the pupils are participative in doing the activities. Thus, I am requesting your approval in allowing me to use this SIM in my Science class as part of the instructional materials. I earnestly hope for your support and

Green Computing

4836 words - 20 pages Chapter 11: Green Computing Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering National Taipei University Prof. Chih-Shun Hsu Department of Information Management Shih Hsin University Outline 1.  2.  3.  4.  5.  6.  Abstract Green computing architecture Regulations and industry initiatives Approaches to green computing Conclusion Reference 2 1. Abstract 1. Abstract •  In 1992, the US Environmental Protection

Similar Documents

Handbook Essay

2202 words - 9 pages NATIONAL SCIENCE CLUB MONTH 2015 NATIONAL SCIENCE CLUBS SUMMIT September 5-6, 2015 STUDENT FACILITATOR’S HANDBOOK I. Event Description September is considered the National Science Club Month (NSCM) under Presidential Proclamation No. 264. During the NSCM, the Philippine Society of Youth Science Clubs (PSYSC) conducts activities that encourage the youth to actively participate in the science clubbing movement. Through these activities

Orion Shielf Essay

2249 words - 9 pages , where it was found the incorrect raw material was used in the production of the mix. SEC was awarded another contract solely based on the longer-life raw materials, which included JXB-3, due to the successful results of testing; however, Allison hid from STI that testing proved the SEC raw materials would last less than five years; therein, the materials were not long term capable. According to the National Science Foundation there are three types

Excretory System Science Project Ideas Essay

393 words - 2 pages tips and award extra points for students who can make their models out of recyclable materials. For example, a balloon can be used to represent the bladder and kidneys can be modeled from a basic dough that is colored with food dyes. Filter System Project * This science project shows how the kidneys work together as a filtration system. It is a simple science project for younger students that demonstrates the concept of a filter and how it

Amorphous Thermoplastics Essay

8784 words - 36 pages field of polymer science. Thermopalstic elastomers have become a significant part of the polymer industry. They are used in many applications like adhesives, footwear, medical devices, automobile parts house hold goods, etc. TPE were introduced commercially in 1960. ] ] ] _ ] annual consumption of TPE materials is growing at a rate of 11% per year. The first generation TPE were made using Ethylene Propylene Diene Monomer (EPDM) and ppolypropylene(PP