Fabrication of Lowcost Saltspray Chamber For Testing Corrosion Resistance of Materials
- April 28, 2018
- Posted by: RSIS
- Category: Mechanical Engineering
International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue IV, April 2018 | ISSN 2321–2705
Fabrication of Lowcost Saltspray Chamber For Testing Corrosion Resistance of Materials
Sathish Kumar.M#1, Dineshbabu.S.S#2, Deepan Suriyaa.M.P#3, Bharathkumar.T#4
1, 2, 3, 4 Mechanical Department, SNS College of Engineering, Coimbatore, Tamil Nadu, India
Abstract— The main aim of this project is to design and fabricate low cost salt spray testing machine which is able to identify the corrosion formation in any type of metals; from this testing process we can improvise the life span of the particular metal. A motorbike has a paint coated footrest made of stainless steel, so this part when comes in contact with atmosphere nearly after a year it is corroded so if salt spray testing machine is used at this point can found out that for additional coating of paint, whether it will withstand up to longer duration likewise, this process can be analysed. This salt spray testing machine is fabricated for low cost and the stainless steel grade 316L is tested and analysed.
Keywords—salt spray, 316L SS, weight loss, corrosion.
I. INTRODUCTION
The salt spray test is a popular test corrosion method; it is used to measure the corrosion resistance of materials at high temperature. The salt spray test in other words ASTM B117 and fog testing. This salt spray test implements the corrosive attack to the samples which is coated completely on the selected material.
II. HISTORY OF SALT SPRAY TESTING MACHINE
In the year 1939 ASTM B117 was recognized as the first international salt spray standard .The formation of rust is evaluated after a pre-determined period of time. Time duration completely depends on the corrosion resistance of the coating, in general if the corrosion resistance is coated more may be five or six layers then it takes longer period of time to appear rust or corrosion.
The temperature which is standard maintains at 95°F (+ 34°F to 35°F) (35°C (+ 1.1°C to 1.7°C))and the pH range of 6.5 to 7.2 with a 5 parts sodium chloride to 95 parts ASTM D1193 Type IV water of salt atmosphere is introduced into the chamber at specific air pressure.
