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porous coatings

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Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005656
EISBN: 978-1-62708-198-6
... Abstract Porous coatings are used in the field of joint replacement, particularly in cementless total hip/knee arthroplasty. This article reviews the offerings and biomaterial properties in orthopedic surgery for the contemporary class of highly porous metals. It describes the traditional...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006012
EISBN: 978-1-62708-172-6
... been used to coat glass slides using a sol-gel method so that optimal surface roughness for both superhydrophobicity and transparency was obtained ( Ref 43 ). After treating the surface with perfluoroalkylsilane, the WCA was more than 155°. A porous silica surface also can be coated with 3-aminopropyl...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001300
EISBN: 978-1-62708-170-2
... side. For most coating-substrate combinations, a hot mounting medium is preferred, but for temperature-sensitive or porous coatings, better results are obtained when a cold-setting resin is used. The section should then be ground back until a flat surface is produced. When dealing with coated samples...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001318
EISBN: 978-1-62708-170-2
... curing with an acid-activated tetraethoxysilicate liquid produces SiO 2 coating of the porous surfaces. A surface sealant consisting of a mixture of a commercial alkali silicate bonding liquid filled with SiC powder is then applied. This system was designed to provide protection during multiple...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006049
EISBN: 978-1-62708-172-6
... coatings, a rough, often very porous primer surface results. This porosity is filled with air, often mixed with volatilizing solvent. When a topcoat is applied over this porous surface and the temperature increases, bubbling and blistering of the topcoat often results. Figure 11 depicts the relative...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006015
EISBN: 978-1-62708-172-6
... special type of defect that is particularly prevalent when coating porous substrates such as castings or substrates with a heavy galvanized coating. The pinholes result from the air escaping from the porous substrate though the coating as it gels. Pinholes also can result from the release of water during...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006029
EISBN: 978-1-62708-172-6
... and masonry surfaces. Porous substrates, however, require not only protection from exterior attack from chemicals, rain, and sun, but also protection from attack from within the substrate itself. Moisture wicks through concrete wall and wooden boards, thereby destroying the adhesion of the coating...
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
... polyurea over steel/soluble salts Most application work for polyurea technology is coating/lining of concrete or other porous substrates. Because the polyurea systems are processed at elevated temperatures in the application equipment, and the thermoset reaction is exothermic, application can result...
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
... economics and structural integrity as a construction material and also acts as an effective radiation shield. However, concrete surfaces are not without inherent problems. Concrete is porous and must be coated to avoid surface contamination and penetration from radionuclides when used in nuclear containment...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006041
EISBN: 978-1-62708-172-6
... Abstract This article provides background information on the chemistry, coating properties, resin types, applications techniques, and performance characteristics of fluoroethylene vinyl ether (FEVE) resins. It describes the formulation methods of FEVE resins, namely, solvent-based coating...
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
..., has a high sintering point, and consequently forms a relatively porous surface when used as a coating. The sintering point is well above the temperature that typical coating substrates can withstand before losing their mechanical properties. In addition, PTFE has no known commonly-used solvents that...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001275
EISBN: 978-1-62708-170-2
... protection in this medium; however, they furnish excellent protection in marine atmospheres and in high-humidity environments. The protection provided by chromate coatings increases directly with thickness up to a certain point, after which the protective nature is sacrificed due to the formation of a porous...
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
... Abstract This article focuses on marine coatings associated with protecting commercial and military vessels. It provides detailed information on the common issues and requirements encountered when coating ballast tanks, freeboard, topside, and decks of the vessel. The article describes the...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006072
EISBN: 978-1-62708-172-6
... Abstract This article provides a basic overview of bridge corrosion, where it occurs on steel and concrete bridge structures, and how to prevent corrosion by using coatings. It describes types of bridge designs, with illustrations, and presents information on how corrosion occurs in different...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003832
EISBN: 978-1-62708-183-2
... in aqueous chloride-containing environments. More recently, such techniques have also been applied to thermal-sprayed metallic coatings ( Ref 28 ) to provide a relatively quick method to rank their resistance to corrosion. When the spray coating is porous—higher than 1 vol%—the influence of the...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006044
EISBN: 978-1-62708-172-6
... Abstract Acrylic coatings are one of the major generic classes of organic coatings and are prevalent in both architectural and industrial applications. This article provides information on the chemistry of acrylic polymers, the methods used in their manufacture, the relationship between...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006007
EISBN: 978-1-62708-172-6
... fluidized bed consists of two chambers, one above the other, separated by a porous membrane or diffusion plate ( Ref 38 ). The upper chamber is filled with powder coating material. Air introduced into the lower chamber flows through the diffusion plate to suspend the powder. This process expands the...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001272
EISBN: 978-1-62708-170-2
... carbonate. If the supply of air to the surface of the zinc coating is restricted, as in a narrow crevice, then sufficient carbon dioxide is not supplied for the formation of the normal layer of zinc carbonate. The layer of zinc oxide and zinc hydroxide is voluminous and porous and adheres loosely to the...
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
... molecule. Moreover, its small size enables it to readily permeate molecular interstices and microscopic pores, holidays, cracks, and defects inherent in almost any coating system. Water vapor can move in and out of porous materials with ease, as long as there is a driving force causing its movement. What...
Book Chapter

By Barry Law
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006060
EISBN: 978-1-62708-172-6
... Abstract This article presents a background of green chemistry and green coatings, and a summary of the key concerns of the green coating procurement process. It includes a discussion on green marketing and the seven sins of greenwashing, an overview of the environmental certification standards...