Microstructural and aqueous corrosion aspects of laser-surface melted type 304 SS plasma-coated mild steel

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Journal of Materials Engineering and Performance; (United States)

DOI:https://doi.org/10.1007/BF02645340· OSTI ID:6890011

Pujar, M G; Dayal, R K; Raman, R K.S. ^[1]

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1. Indira Ghandhi Centre for Atomic Research, Kalpakkam (India)

Plasma spray deposition of metals, ceramics, or plastics onto base metals to produce wear- and corrosion-resistance surfaces is a promising technique whereby base metal performance can be considerably improved. Because these coatings invariably contain pores, voids, and cracks, laser surface melting may be employed to improve their homogeneity. This study focuses on the corrosion performance of laser-surface-melted type 304 SS plasma-coated mild steel specimens. Mild steel strips were plasma coated with an approximately 100 to 200 [mu]m thick layer of type 304 by transferred plasma jet. These specimens were subsequently laser irradiated using a 3 kW continuous-wave CO[sub 2] gas laser. Eight different sets of specimens were selected based on different laser beam travel speeds. Scanning electron microscopic studies of the plasma-coated specimens revealed both pancake and flowery types of deposited particles. Optical microscopic studies followed by anodic polarization experiments were carried out on these specimens in 1N H[sub 2]SO[sub 4] medium. It was observed that specimens with laser beam interaction times ranging from 30 to 120 ms showed relatively better general corrosion performance than specimens with interaction times of from 15 to 24 ms.

• OSTI ID: 6890011
• Journal Information: Journal of Materials Engineering and Performance; (United States), Journal Name: Journal of Materials Engineering and Performance; (United States) Vol. 3:3; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
COATINGS
CORROSION PROTECTION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
DATA
DEPOSITION
EXPERIMENTAL DATA
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MICROSTRUCTURE
NICKEL ALLOYS
NUMERICAL DATA
PLASMA ARC SPRAYING
PROTECTIVE COATINGS
SPRAY COATING
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS
SULFURIC ACID
SURFACE COATING