surface coating Flashcards
- substances that are products of mixtures of film-forming materials, pigments, solvents, and other additives, that are applied to a surface, and then dried, which will yield a thin film that is functional and decorative in sense.
surface caoting
comprised of interconnected molecules that
allow the formation of a product that is flexible, adhesive
and tough, when applied to surfaces.
surface coating
insoluble particulate materials that
provide colour, opacity, gloss control, rheological
control, and certain functions such as corrosion
inhibition or magnetic moment
pigments
reduce the cost of coatings by acting
as a volume filler
pigments
primary binders
which provide adhesion and substrate
protection
resins
act as carriers for surface coatings such as
paints, varnishes and adhesives
solvent
the flavors and spices of a
coating
additive
enhance the inherent properties of the
resin
addtive
synthetic pigments
EGYPTIANS (3000–600 BC)
* Pigments with a wider range of colors
* First synthetic pigment (Egyptian Blue)
* Preservative paints and varnishes
synthetic pigments
Egyptian Blue
Quarts, chalk (calcium carbonate), malachite (copper
carbonate) and soda ash are combined and heated to 900 °
C-1000 °C
Egyptian blue
resin can be used as varnish, and the addition of oil
apparently dissolve the solvent and turn the solution into
varnish.
true
Paints were made in ________ before
batches
The need for _________ and __________ accelerate the rate of
scientific discovery
anti-corrosive and special coating
the white pigment was discovered that would replace white
lead (1918)
Titanium dioxide
middle of 20th century
Natural oils were replaced by synthetic resin
- used in modern car, ships and spacecraft due to its high end anti-corrosion coating propertie ans is odorless and is less toxic.
Acrylic polyurethane “enamel”
Composed of epoxy resins and polyamine hardeners
epoxy coating
Cross-linking of compounds during curing
epoxy coating
Durable and rigid plastic coating
epoxy coating
Mechanical properties: hardness, durability, resistance, commonly
used in automotive industry
epoxy coating
Mechanical properties: hardness, durability, resistance, commonly
used in automotive industry
epoxy coating
Characteristics that can easily be modifified (glossiness or transparency
polyutherane coating
Properties: thermosetting, durable, elastic, softer than epocy, higher resistance in abrasion and dents.
polyutherane coating
Mechanical properties: hardness, durability, resistance, commonly used ij automotive industry.
Commonly used in commercial and automotive industries.
* Water-based polyutherane coatings are non-flammable(use in areas where combustion occurs)
polyutherabe coating
Commonly used in commercial and automotive industries.
Water-based polyutherane coatings are non-flammable(use in areas where combustion occurs)
polyutherane coating
Water-based polyutherane coatings are non-flammable(use in areas where combustion occurs)
polyuthetane coating
Type of polymer (carbamates)
polyutherane coating
Also known as glass coatings, silica coatings, or hydrophobic coatings.
ceramic coating
Liquid polymer
ceramic coating
Semi-permanent
ceramic coating
Properties: Resistance to chemical stains, thermal and UV stability, transparent, non-metallic, easy to clean, non-flammable, hydrophobic
ceramic coating
Commonly used in automotive industry, architecture and marine industry.
ceramic coating
Reacts with heat-swells or increases volume(insulator)
intumescent coal
Classifified based on the surface
intumescent coating
With hydrates-thick layer is soft; release water vapor
intumescent coating
With sodim silicates or graphite- thick layer is hard; stops fifire and gaskets.
intumescent coating
Properties: Retardant, thermal and corrosion protection
intumescent coating
Commonly used coastal buildings, ships, marine structures (alloys and steels)
intumescent coating
Used to cover buildings, furniture and the likes in general
architectural caoting
most used technique for covering metal surfaces in industrial settings
galvanizing method
metal used in galvanization process serves as
noble metal
coated zinc layer serves
active metal
function as cathode
noble metal
function as anode
active metal
a hot alkali solution is
applied to the steel surface to remove common oils and debris
caustic
With a hydrochloric acid solution, the surface rust and scales
are eliminated
pickling
surface oxides are finally eliminated and shielded from
potential threats of additional oxidation
fluxing
An internal direct current force leads to the anode becoming anodically polarized and the
base steel being exposed to the released metal ions in the solution.
refining process
inert anode
material utilized in the system
electrowinning
an electrometallurgical method used to coat metals that cannot be coated using
standard refining or winning procedures
molten salt
lack of external electrical power
electroless
this surface coating technique coats nickel atoms
electroless
thin-film layers are created via the vaporization and condensation
processes
vapor deposition method
high-temperature process that heats a substrate to high temperatures
and vaporizes precursor materials onto the target base metal
vapor deposition method
high-temperature process that heats a substrate to high temperatures
and vaporizes precursor materials onto the target base metal
vapor deposition method
base metal is immersed in a chromium-ion solution
chromating process
capable of self healing
chromate coating
protective film created by the base metal, and certain
metals, such as Ti and Al, can develop a shielding oxide coating when anodically polarized by an
external electrical source.
anodizing process
Type of surface coating that when applied, needs a bunch of layers to be effective
Organic coating
Egyptian _____ was the first synthetic pigment made by the Egyptians.
Blue
Water-based polyutherane coatings are flammable and are restricted during combustion processes.
False
This electrochemical coating method is typically used to coat nickel atoms.
Electroless
Term used for surfaces onto which surface coating products are applied
Substrate
It is used in modern car, ships and spacecraft due to its high end anti corrosion coating properties, and is widely popular because it is odorless and is less toxic.
Enamel
What is the white pigment that would replace white lead (1918)?
Titanium dioxide
Intumescent coating with _____ is a type of intumescent coating that forms a soft, thick layer which releases water vapor, making it as a good insulator.
Hydrates
Molten Salt is an electrometallurgical method used to coat metals that cannot be coated using standard refining or winning procedures.
True
When was the first evidence of painting discovered?
Stone age
