scholarly journals Demonstration of thermally sprayed metal and polymer coatings for steel structures at Fort Bragg, NC : final report on Project F07-AR10

2017 ◽  
Author(s):  
Larry Stephenson ◽  
Alfred Beitelman ◽  
Richard Lampo ◽  
Ashok Kumar ◽  
Douglas Neale ◽  
...  
Keyword(s):  
Steel Structures ◽  
Polymer Coatings ◽  
Final Report ◽  
Fort Bragg ◽  
Thermally Sprayed

Studies of the Flame Spraying of Polymers

1996 ◽  
Author(s):  
D.J. Varacalle ◽  
K.W. Couch ◽  
V.S. Budinger
Keyword(s):  
Bond Strength ◽  
Combustion Process ◽  
Experimental Studies ◽  
Polymer Coatings ◽  
Flame Spraying ◽  
Knoop Microhardness ◽  
Resultant Coating ◽  
Strength Characterization ◽  
Thermally Sprayed

Abstract Experimental studies of the subsonic combustion process have been conducted in order to determine the quality and economics of polyester, epoxy, urethane, and hybrid polyester-epoxy coatings. Thermally sprayed polymer coatings are of interest to several industries for anti-corrosion applications, including the infrastructural, chemical, automotive, and aircraft industries. Classical experiments were conducted, from which a substantial range of thermal processing conditions and their effect on the resultant coating were obtained. The coatings were characterized and evaluated by a number of techniques, including Knoop microhardness tests, optical metallography, image analysis, and bond strength. Characterization of the coatings yielded thickness, bond strength, hardness, and porosity.

Thermally Sprayed Ternary Materials for Enhanced Corrosion Protection

1997 ◽  
Author(s):  
T. Lester ◽  
S.J. Harris ◽  
D. Kingerley ◽  
S. Matthews
Keyword(s):  
Barrier Layer ◽  
Salt Spray ◽  
Thermal Spraying ◽  
Steel Structures ◽  
Deposition Efficiency ◽  
Aqueous Corrosion ◽  
Metal Coatings ◽  
Zinc Coatings ◽  
Thermally Sprayed ◽  
Better Than

Abstract Thermal spraying has been used to protect many steel structures from aqueous corrosion using Zinc and Aluminium, and to some extent their alloy coatings to provide galvanic protection. The lifetimes of the coatings can approach 50 years even when exposed in severe marine environments. Zinc coatings work by continuously sacrificing themselves and slowly dissipating over time. Aluminium coatings passivate more readily and form a barrier layer, the passivity makes them less able to protect damaged areas and to self heal. A new ternary coating system involving Aluminium, Zinc and Magnesium has been shown to be capable of providing both a passive barrier layer as well as being able to give galvanically active protection. Salt spray tests have shown that the resistance to red rust of these new coatings increases by 300% over similar thicknesses of the separate metal coatings. Processing by arcspray is straightforward and both adhesion and deposition efficiency are better than where Zinc is sprayed alone.

Thermally Sprayed Coatings as Corrosion Protection for Steel Structures – Influence of the Manufacturing Processes on the Coating Quality

2015 ◽  
Vol 227 ◽  
pp. 171-173 ◽  
Author(s):  
Teodora Maghet ◽  
Jörg Mährlein ◽  
Thomas Wilhelm ◽  
Monica Sallai ◽  
Susanne Friedrich ◽  
...  
Keyword(s):  
Steel Structures ◽  
Weather Conditions ◽  
Energy Industry ◽  
Coating Quality ◽  
High Corrosion Resistance ◽  
Thermally Sprayed Coatings ◽  
Technical Construction ◽  
Corrosive Environments ◽  
Thermally Sprayed ◽  
Sprayed Coatings

The use of technical construction parts in corrosive environments frequently leads to costly damage and sometimes to a loss of the functionality of the component parts. Particularly to be noted in this regard are steel structures exposed to industrial and maritime weather conditions (e.g. steel towers, tower flanges for the wind energy industry, primarily in coastal and offshore regions, supports and arch parts used in bridge construction, etc.). These require an especially high corrosion resistance.

scholarly journals Hydrogen in Aluminium-Coated Steels Exposed to Synthetic Seawater

Surfaces ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 282-300 ◽  
Author(s):  
Shiladitya Paul
Keyword(s):  
Open Circuit Potential ◽  
High Strength Steels ◽  
Steel Structures ◽  
High Strength ◽  
Open Circuit ◽  
Coated Steel ◽  
Synthetic Seawater ◽  
Uncoated Steel ◽  
Thermally Sprayed ◽  
Sacrificial Protection

Thermally sprayed aluminium (TSA) coatings provide protection to offshore steel structures without the use of external cathodic protection (CP) systems. These coatings provide sacrificial protection in the same way as a galvanic anode, and thus hydrogen embrittlement (HE) becomes a major concern with the use of high strength steels. The effect of TSA on the HE of steel seems to remain largely unknown. Further, the location of hydrogen in TSA-coated steel has not been explored. To address the above knowledge gap, API 5L X80 and AISI 4137 steel coupons, with and without TSA, were prepared and the amount of hydrogen present in these steels when cathodically polarised to −1.1 V (Ag/AgCl) for 30 days in synthetic seawater was determined. One set of TSA-coated specimens was left at open circuit potential (OCP). The study indicates that the amount of hydrogen present in TSA-coated steel is ~100 times more than the amount found in uncoated steel, and that the hydrogen seems to be largely localised in the TSA layer.

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