Comparative Analysis of Different Corrosion Test Cycles Tata Motors, Limited

Format:

Book

Conference/Event

Author/Creator:

Kumar, Animesh, author.

Contributor:

Borate, Rahul

Hatwalne, Mrunal

Ponkshe, Shripadraj

Conference Name:

International Conference on Automotive Materials and Manufacturing AMM 2023 (2023-06-01 : Pune, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2023

Summary:

Corrosion in automotive industry is broadly categorized into cosmetic and perforation corrosion. Cosmetic corrosion comprises of superficial red rust which is deleterious to the overall aesthetic appeal of the vehicle but can be rectified. Perforation corrosion involves complete erosion of the panel, compromising structural integrity of the respective part. Perforation corrosion demands part replacement. In order to tackle this menace, automotive OEMs have formulated varied corrosion strategies in terms of selection of appropriate substrate, part design and surface protection scheme.Validation of various corrosion strategies become pivotal during the development phase of various parts and assemblies. Traditionally, Salt Spray Test (SST) has been used to determine corrosion life of materials/parts/assemblies. This test however does not simulate real-world conditions. Another test method, Cyclic Corrosion Test (CCT) with dynamic state conditions, wherein the relative corrosion rates, corrosion structure and morphology are more similar to those seen outdoors. However, there exist numerous CCT cycles having varied frequencies and intensities of salt fogging, wetting, ambient and drying cycles. Moreover, OEMs have formulated various-vehicle level Proving Ground tests wherein entire vehicle assembly is subjected to an accelerated corrosive condition.In the present Indian automotive industry, there does not exist a correlation between the predominantly used corrosion test cycles. In this study we have undertaken exhaustive evaluation of cosmetic corrosion performance in SST and CCT-two different Test Cycles. The cosmetic corrosion performance has been characterized based on observed creep-back analysis, after 1400 hours of testing. A comparative analysis has been undertaken of the cosmetic corrosion performance observed in various test cycles with respect to Proving Ground tests

Notes:

Vendor supplied data

Publisher Number:

2023-28-1325

Access Restriction:

Restricted for use by site license