AMPP Level I

Coatings Pt. 1

on a job site which coatings require constant agitation during application?

Check data sheet for further information - always go by spec or data sheet.

what coatings are most likely to be moisture sensitive?

epoxy and polyurethane

what coatings are moisture cured ?

organic zinc

what test(s) is used to verify zinc primer hardness for topcoating?

solvent run and coin hardness

what test(s) is used to check abrasive cleanliness ?

jar test

what is dew point ?

the temperature at which moisture in the air will condense on the surface

what test(s) is used to check surface profile?

surface profile comparator & testex replica tape

when should ambient temperatures be taken?

before work is started, every 2 hours, as needed based on weather, and after daily work is completed.

the dew is allowed to be at what temp prior to painting?

5 degrees below the surface temp

where should the surface temperature readings be taken?

in the work area

as a general rule, surface profile should be what percent of the total dry film thickness ?

For testing its 20%, HOWEVER look at data sheet to clarify

which SSPC is a “commercial blast” ?

SSPC-SP6

which SSPC is a '“near white blast” ?

SSPC-SP-10

once the paint or paint related material is received on site what should be documented?

product name, color, batch #, and product type

thinning of paint shall only be done when the project specifications allows?

true

the amount of thinner to be used will be found in the project specifications?

true

adding thinner to paint can extend the potlife of the material?

false

calibration of a type I dry film thickness gage is to be done in accordance with?

manufacturers requirements, regardless of type go by MR

when should the dry film thickness be calibrated?

before the gage is used, after all readings are taken, and when gage has been dropped.

when using a type I dry film thickness gage, the instrument should not be used closer than 2 inches from an edge of the surface.

false, 1 inch for type 1 & 2

when the work is not being performed by the specifications or governing standards, who should you tell first?

job supervisor

when do you verify surface cleanliness?

before painting

prior to blasting the following shall be removed in accordance with SSPC-SP1(solvent cleaning)?

grease, oil, and dirt

when holiday testing the interior of the tank the only areas required to be tested is below the water line?

false

if the contractor does not supply safe rigging equipment for your inspection you should?

report the situation to your supervisor

a grinder can be used to establish a surface profile under the “commercial blast” (SSPC-SP6) guidelines?

false, cant use a grinder to do a blast

when using airless spray equipment and the tip size is 319, what is the fan width of the material being sprayed at a distance of 12 inches?

6 inches, take front # and multiple by 2 ( # given 319 so 3 × 2 = 6 and 19 is the amount of material sprayed)

when using airless spray equipment the distance from the work space to the spray gun should be ?

10 - 12 inches, can range 10-16 inches

what is the SSPC - VIS 1 standard used for ?

verifying surface cleanliness and verifying rust grade

when viewing a near white blast how much paint rust or mil scale is allowed to remain on the steel?

a near white blast refers to NO PAINT

what is the role of the coating inspector?

to observe, document, and report

which surface preparation specification is “solvent cleaning”?

SSPC-SP1

which surface preparation specification is “ hand tool cleaning”

SSPC-SP2

which surface preparation specification is “power tool cleaning” ?

SSPC-SP3

which surface preparation specification is “white metal blast cleaning”?

SSPC-SP5

which surface preparation specification is “commercial blast cleaning”?

SSPC-SP6

which surface preparation specification is “brush off blast cleaning”?

SSPC-SP7

which surface preparation specification is “near white blast cleaning”?

SSPC-SP10

define SSPC-SP1?

removal of oil, grease, soil and other contaminants by use of solvents, emulsions, cleaning compounds, steam cleaning or similar materials and methods which involve a solvent or cleaning action.

define SSPC-SP2?

removal of loose rust, loose mill scale and other detrimental foreign matter to degree specified by hand chipping, scraping, sanding, and wire brushing.

define SSPC-SP3

removal of loose rust, loose mill scale and other detrimental foreign matter to degree specified by power wire brushing, power impact tools or power sanders.

define SSPC-SP5

blast cleaning to a gray-white uniform metallic color until each element of surface area is free of all visible residues.

define SSPC-SP6

blast cleaning until at least two thirds of each element of surface area is free of all visible residues

define SSPC-SP7

blast cleaning to remove loose rust, loose mill scale and other detrimental foreign matter to degree specified.

define SSPC-SP10

blast cleaning to nearly white metal cleanliness until at least 95 percent if each element of surface area is free of all visible residues.

Which component of coating can contain harmful volatile organic compounds?

Solvents

Based on the galvanic series presented, which three materials are commonly used as gallic and for carbon steel?

Zinc, aluminum and magnesium

a decrease in temperature will generally cause corrosion rate to

decrease

the electrolyte is a medium that carries what type of current?

ionic

Which type of coding is manufactured with specific components that become the aid of the electrochemical cell?

sacrificial

which coating component forms a stable film that retains its characteristic properties?

binder

a barrier coating interrupts the __ of the electro chemical cell.

Electrolyte

Select the environments that are most susceptible to corrosion

Marine environment and chemical environment with high humidity

How do electrons that are produced in the oxidation reaction flow?

From the android to the pathway through the metallic path

Define binder

bond pigments together and adhere to surface

Define solvent

Liquid that dissolves solid resins

Define pigment

As the substrate provides decorative color, enhances desired properties

Define additives

special purpose ingredients used to enhance product performance

Define vehicle

liquid portions of the coating

Define corrosion

Deterioration of a metal or alloy results from an electro chemical reaction in the environment

What is passivation?

a layer of oxide formed on the surface of a metal that provides corrosion protection stainless steel for example

What are the elements of a corrosion cell?

ACME - Anode Cathode Metallic pathway Electrolyte

Describe what happens to the anode

The metal dissolves into the electrolyte

What are the three coding properties that might be a priority for the underwater support system of this offshore rig?

Water resistance, waterproofing, and marine fouling

What is the function of the electrolytes?

Allows the passage of ions to connect the corrosion cell

What is the function of the metallic pathway?

Allows the flow of electrons to connect the corrosion cell

What is the galvanic series?

A list of metals in order of reactivity (more or less noble) in sea water

The general rules of galvanic corrosion are

The less noble metal(more reactive) connected to a more noble metal (less reactive) will corroded faster

What is localized corrosion?

Typically pitting and crevice corrosion, of the most concern as damage is concentrated and loss of integrity or structural failure can result

Name the five important factors that affect the rate of corrosion

Humidity, oxygen, pollutants, temperature & chemical salts

What is General corrosion?

Results in a relatively uniform loss of material over the entire surface - results in a general thinning of the affected surface - relatively easy to inspect - Does not cause catastrophic value

What are the primary components of a liquid applied coating

Pigment vehicle resin/binder solvent

What are the two broad classifications of a coating?

Organic convertible - thermosetting, and inorganic non-convertible - thermal plastic

What are three methods by which according provides corrosion control?

Barrier inhibitive and sacrificial

what is an example of passivation?

stainless steel

what the common tools/methods used for corrosion control?

inhibitors, design, material selection, cathodic protection, protective coatings

what is the inspectors role in regards to safety?

to report any issues that may affect the project - inspector is not enforce safety

what tests can an inspector conduct during surface prep and coatings operations?

temperature, relative humidity, dew point, anchor profile, & surface cleanliness

what forms of documentation/reports may be required to be maintained on a coatings project?

daily/weekly summary, material reports, manpower and equipment, non conformance, and conformance

what are the characteristics of a good report?

objective, accurate and detailed

what is the inspectors primary responsibility and what should the inspector not do as it pertains to the specification?

the primary responsibility is to enforce the specification and NOT make changes to the specification.

what type of information is expected to be found on the PDS?

surface prep, recommended surface cleanliness, recommended application methods, equipment needed (tip size), max and min temperatures