Service life prediction for aircraft coatings

Guseva, Olga; Brunner, Samuel; Richner, Peter

doi:10.1016/s0141-3910(03)00124-1

Cited by 49 publications

(23 citation statements)

References 6 publications

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“…In some cases, gloss loss is even used for service life prediction. 7 Calculation of gloss starting from a surface with known properties is a complex problem. In addition to surface roughness, the topographical orientation of the microfacets and refractive index of semitransparent samples influence gloss.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

2008

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Several solvent-and water-borne exterior wood coatings were artificially weathered to study their performance behavior. Penetration and layer thickness were measured on unweathered samples and compared to theoretical estimates by means of measured basic parameters of coating and substrate. Color, surface roughness, gloss, and adhesion were monitored during aging, and the latter two were also calculated and compared to their experimental values. Theoretical values of gloss, and especially those of adhesion, were less successful on an absolute scale, but were in accordance with practical values on a relative scale. The influence of solid content, drying speed, and viscosity on penetration depth manifested itself clearly both in theory and in practice. In general, solventborne coatings performed well, but some water-borne coatings also showed good performance. By measuring the characteristics of a coating as described in this article, it is possible to rank the coatings and follow their weatherability. Finally, calculation of theoretical values proved a promising method for initial screening purpose.

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Section: Introductionmentioning

confidence: 99%

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

2008

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“…The APP is hydrolytic and produces ammonium ions (NH 4 + ) and pyrophosphate in a corrosive environment. 15 The process of the hydrolysis would be catalyzed by the action of the NH 4 + and Cl − in the hydrochloric acid solution, leading to the production of ammonium chloride. 25 The process of hydrochloric acid penetrating into the coating and the process of ammonium polyphosphate diffusing to the surface occurred simultaneously.…”

Section: Resultsmentioning

confidence: 99%

Experimental Study of the Acid Corrosion Effects on an Intumescent Coating for Steel Elements

Wang

Song

Zhang

et al. 2014

Ind. Eng. Chem. Res.

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Acid corrosion may cause the deterioration of the fire resistance of the intumescent fire retardant coatings. This paper reported the results of an experimental study of degradation in fire protection performance of intumescent coating for steel elements after different times of immersion in the hydrochloric acid solution. The morphology, the equivalent thermal resistance, and the changes of the elements and groups contained on the surface of the coatings were investigated. The corrosion mechanism was as follows: when the coating was immersed in the acid solution, the ammonium polyphosphate (APP), pentaerythritol (PER), and melamine (MEL) underwent the process of acid catalyzed hydrolysis, dissolution, and chemical reaction, which led the change of the content ratio of the compositions and caused the deterioration of the coating fire resistance. A prediction method of the remaining fire resistance property for the acid corrosion coatings was proposed, by comprehensively considering the physical and chemical characteristic changing trends of the corroded coating.

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“…Many different challenges can cause problems to the aircraft service during whole its life cycle. The further list can describe the complexity and difficulties that aircraft are exposed to and have to overcome during the long service life cycle [6][7][8]:…”

Section: Operational Environmental Climate and Other Influences On mentioning

confidence: 99%

Service life extension program for aircraft structures

Maksimović¹,

Vasić²,

Došić³

2015

Sci Tech Rev

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Performance of aircraft in general, its systems and airframe materials, can be significantly reduced by environmental conditions in which the aircraft operates during the service life. Material performance of steel and aluminum alloys can be greatly degraded because of the environmental conditions (temperature, humidity, UV radiation, pollutants, etc.), which severely affect the integrity and safety of aircraft structure. Apart from the other severe environmental conditions, the effect of the corrosion on structural integrity is a critical issue for damage tolerance design and analysis and needs to be carefully investigated. The corrosion and corrosion fatigue failure process of an aircraft structure are directly concerned with many factors, such as load, material characteristics, and corrosive environment and so on. Attention in this paper is focused on the application of the Nondestructive Inspection (NDI) methods in the process of extension of service life of aircraft structures. The NDI methods were used as a part of service life extension program for the extension of the operation life of the G-4 Super Galeb aircraft structures that have been in service in air force for more than 25 years. The computation and experimental NDI methods and practice steps that diminish the negative effects of corrosion process were shown in this paper. Special attention in this paper is focused to the use of the NDI methods. These steps enable to extend the service life of aircraft structures beyond its designed service life with the accurate prediction of the further service reliability

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Service life prediction for aircraft coatings

Cited by 49 publications

References 6 publications

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

Experimental Study of the Acid Corrosion Effects on an Intumescent Coating for Steel Elements

Service life extension program for aircraft structures

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