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osmotic blistering

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Published: 30 September 2015
Fig. 35 Osmotic blistering of polyurea over steel/soluble salts More
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006070
EISBN: 978-1-62708-172-6
... Abstract Soluble salts on a surface can affect a steel substrate or coating in two principal ways: corrosion acceleration and osmotic blistering. This article provides a detailed discussion on the mechanisms for each of these deleterious effects. It describes the most detrimental anions...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006037
EISBN: 978-1-62708-172-6
..., there are still many instances in which disbondment or blistering occurs even when all of these factors are precluded. Published theories of the various mechanisms for blistering in flooring can be divided into two groups: osmosis and nonosmosis. Osmosis Osmotic blistering usually does not appear until...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006031
EISBN: 978-1-62708-172-6
... at the coating-substrate interface (e.g., salt residues from pretreatment processes, hard water salts, etc.). These impurities can lead to osmotic blistering. That is, water permeates through the paint film to achieve equilibrium with the impurities (i.e., osmosis). The water pressure that builds at the coating...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006008
EISBN: 978-1-62708-172-6
... surface. Blisters may contain liquid, vapor, gas, or crystals. Probable causes: Many mechanisms can be involved, including osmotic gradients associated with soluble salts, soluble pigments, corrosion products, retained solvents, and solvents from cargoes. Nonosmotic blistering is associated...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006073
EISBN: 978-1-62708-172-6
... osmotic blistering of coatings in immersion service and/or accelerated rates of corrosion in atmospheric service if they are allowed to remain on a substrate before painting or between coats of paint. Once water enters the paint film, the small water molecules have the ability to penetrate between...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006047
EISBN: 978-1-62708-172-6
... ). If they are, they must be removed prior to application of the polyurea coating/lining system. Because these are soluble salts, the most common method of removal requires the use of water, the universal solvent. As with the cold wall blistering shown in Fig. 34 , osmotic blistering can occur as a consequence...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006035
EISBN: 978-1-62708-172-6
... irradiated to receive an accumulated dose of 1 × 10 9 rads in accordance with Ref 4 . The test method is used to demonstrate that under DBA conditions, a containment coating will remain intact (although blisters are permitted) and not form debris that could unacceptably compromise the operability...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003844
EISBN: 978-1-62708-183-2
... of retained solvents in the paint film. The entrapped solvents may draw water into the coating at the bottom of the tank, causing osmotic blistering. This may be a problem not only on tank bottoms but anywhere a heat sink may occur, such as exterior steel supports, cradles, or bracing. Baking or heating...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006929
EISBN: 978-1-62708-395-9
...). It is significant that in cases involving no attack of a plastic by an active ion, the presence of a dissolved ion may act to diminish the amount and effects of water absorption. Water absorption is an osmotic phenomenon which is governed by the thermodynamic activity of water either in solution or in the vapor...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006013
EISBN: 978-1-62708-172-6
... the film and the application space. Many ballast tanks can be complex in nature ( Fig. 3 , 4 ) compared to large, single compartments, providing challenges for proper ventilation. Improperly vented tanks lead to solvent entrapment, an improperly cured film, osmotic blistering, and early coating failure...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004121
EISBN: 978-1-62708-184-9
...-suppression system at an Army airfield), where the original lead-base paint was overcoated to dry film thicknesses of about 190 μm (7.5 mils) with test coatings of two moisture-cured polyurethanes. Both overcoating systems performed well over a winter test period with no evidence of blistering, spalling...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004168
EISBN: 978-1-62708-184-9
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006016
EISBN: 978-1-62708-172-6
... the coating film, often enough to cause blistering of the coating (known as osmotic blistering), underfilm corrosion, and premature coating failure. Additionally, if soluble salts on the surface are not sufficiently removed prior to abrasive blast cleaning, recycled abrasive media can become contaminated...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002464
EISBN: 978-1-62708-194-8
... or colligative properties such as osmotic pressure, boiling-point elevation, or freezing-point depression. M ¯ w can be measured by light-scattering techniques or ultracentrifugation, both of which depend on the mass of species present ( Ref 12 ). As shown in Fig. 2 , many physical and mechanical...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004190
EISBN: 978-1-62708-184-9
..., and poor surface preparation can lead to poor bonding. The blistering is believed to be caused by osmotic pressure buildup when liquor permeates the coating. Anodic Protection Monitoring corrosion potential in carbon steel batch digesters has revealed that the potential cycles change from active...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.9781627082006
EISBN: 978-1-62708-200-6
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003068
EISBN: 978-1-62708-200-6
.... ofAl203 made by thermal decomposition of gibbsite at absolute viscosity. See viscosity. 350 to 400 °C (660 to 750 °F), used as a catalyst, absorption. (1) The taking up of a liquid or gas by catalyst carder, and absorbent. It is chemically inert to capillary, osmotic, or solvent action. (2) The capacity...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005748
EISBN: 978-1-62708-171-9
.../asm.hb.v05a.a0005748 www.asminternational.org Glossary of Terms* A absorption. (1) The taking up of a liquid or gas acoustical room. A soundproof enclosure con- abhesive. A material that resists adhesion. by capillary, osmotic, or solvent action. taining thermal spraying and sometimes (2) The ability to receive...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.9781627081719
EISBN: 978-1-62708-171-9