Tough ones Flashcards by jake lepich

Hot dipped galvanizing usually consists of how many layers

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What are the 3 steps of surface preparation for galvanization

Caustic cleaning
pickling
fluxing

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With the pencil hardness test the ranges are from what to what?

6H to 6B

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To determine the DFTs with a tooke Gage, what math must be done

Reticle divisions x retical resolution

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For the plastic sheet method, how long should it be in place

16 hours

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For the plastic sheet method, how large should be

18 X 18

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ICRI PLATES ARE FOR WHAT

Concrete surface comparison

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How exactly does salt increase the rate of corrosion

By increasing the efficiency of the Electrolyte

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How can the surface profile of concrete be recorded

Replica putty

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List three ways to smooth concrete and fill in voids

Stoning sacking and trowelling

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Name the 3 types of anti-fouling coatings

Ablative
self smoothing
foul release

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How far should the nozzle be from the surface when removing heavy rust scale for old coatings

2 inches

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Does water jetting create an anchor profile

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What are the 2 types of localize corrosion

Pidding

crevice

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Which part of the corrosion cell are ions transferred

Electrolyte

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What is the industry standard for holiday detection… Volts/mil?

100 V per mil

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What two things does acid etching do

Removes laitence

Ruffins surface

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What are the 3 steps for preparing to coat concrete

Pre-cleaning
surface prep
filling in voids

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Is determining the correct hardness important for the inspection criteria of rubber lining

Yes

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What is the transfer efficiency of electrostatic spray

98%

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What are the 2 types of Plural component spray systems

Fixed ratio

adjustable ratio

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What are the 4 methods of powder coating application

Electrostatic spray
fluidized bed
flame spray
Roto lining

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What are the 2 categories of fireproof coatings

Passive

intumescent

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What type of current is the corrosion current (AC or DC)

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In ohms law, DC currents are defined by what mathematical relationship

Volts = amps/ohms

This type of coating defect happens when a hard coating is applied over a softer coating

Alligatoring

What is another name for a coating "blushing"

Amine sweating

Which salt test indicates the color blue for the presence of salt

Potassium ferricyanide

What is the most commonly used application method for coatings

Airless spray

At a minimum, inspection records should include what 2 things

- Environmental conditions | - The work process from beginning to end

The conductivity meter is used to measure the conductivity of a solution that contains what

Chlorides

Which salt test can be measured using multiple methods

Bresle patch test

Which 2 types of cures are non-convertible

Evaporation cure | Coalescence

Describe SSPC PA 2 measurement method

3 readings within 1.5 inch circle (averaged) 5 of these readings within 100 ft.²

What are the three general responsibilities of the inspector

Observe report document

When using the tooke gauge, the cutting tip is determined by what?

Thickness of coating

With the 10 X cutting tip, one retical division equals how many mils?

0.1 or a tenth of a mil

With the 2X cutting tip, one reticle division equals how many mills?

0.5 or half a mil

With the 1X cutting tip, one reticle division equals how many mils?

1.0 mils

What is the most commonly used acid etching?

Muratic acid (hydrochloric acid)

At what percentage relative humidity does corrosion virtually cease?

40%

Concrete often passivates steel above what pH?

11.5

All coatings are affected by what 2 things?

Time and temperature

For NACE/SSPC standards, can magnifiers be used?

Does electrostatic spray produce thicker coating on edges

Yes

In which solution do you put the probe when you're testing for pH

Aqueous solution

Will an organic solvent clean off chloride, sulfides, and mill scale?

If there are contaminants on the surface and you poor solvent on it to detect contaminants, what should it do?

Flow evenly and not break into droplets

Should an oil based coating be on top of galvanization

Never

What can result from an oil based coating on top of an inorganic zinc coating?

Saponification

Should a solvent-cure coating always be covered by a chemical cure coating?

Do inorganic thinks I have a high heat resistance?

Yes

What are VOC's?

Volatile organic compounds

Can epoxies be solvent-free for you?

Yes

Does coalescence involve water evaporation?

Yes

What is valence bonding?

Adhesion by polarity

What is "volatility"?

The speed at which the solvent leaves the coating

What is "solvency power"?

The ability to dissolve the resin

Which environment is generally the most corrosive?

Chemical/marine

Which environment is the least corrosive, generally?

Rural

The primary responsibility of the inspector.

To enforce the specifications

Organic coatings have less resistance to THIS compared to inorganic coatings.

Heat