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NACE CIP1 > Chapter 8-9 > Flashcards

Chapter 8-9 Flashcards

1
Q

Describe the role of hand and power tools in preparing a surface for coating applications

A
  1. hand tools = removal of loose mill scales, rust and particles
  2. power tools = removal of loose (SP3) and tightly adherent (for SP15/SP11) mill scale, rust, and paint. It is NOT intended to remove adherent mill scale, rust or paint -
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2
Q

Recognize the tools associated with hand tools

A

chisels, knives, wire brushes, scrapers , sandpaper, steel wool
1. sanding tools can create a feathered edge

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3
Q

Recognize the tools associated with power tools

A

rotary wire brushes / needle scaler/ rotary scalers / piston scalers/ grinders
1. Impact tools vs rotary/grinding tools - important to use extreme care because of high possibility of gouging.

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4
Q

impact tools

A

“can create a surface profile, remove weld splatter and heavy mill scale , and rust

needle scallers / piston scalers/ chipping hammers”

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5
Q

specialty tools

A

bristle blaster , all can created a surface profile > 1mils

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6
Q

grinding tools

A

wire brush will not remove weld spatter and only remove loose materials. May result in polished if over-working

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7
Q

Describe the industry standards that govern hand and power tool cleaning (SP2/3/15/11) / VIS ISO1-1 std 2 and std3

A

“SP-2 - hand tool cleaning
SP-3 - power tool cleaning
SP-15 - commercial grade power tool cleaning
SP-11 - power tool to bare metal
VIS 3 - guide and reference to hand/power tool (supplement to SSPC written procedures)
ISO 8501-1 std 2 - thorough hand and power tool cleaning
ISO 8501-1 -std 3 - very thorough hand and power tool cleaning”

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8
Q

SP-2 - hand tool cleaning - description

A

w/o magnification shall be free of visible deposit of oil and grease ad all LOOSE mill scale, rust, paint

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9
Q

SP-3 description

A

power w/o magnification shall be free of visible deposit of oil and grease ad all LOOSE mill scale, rust, paint

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10
Q

SP-15 description

A

free of all VISIBLE oil grease dirt mill scale, rust paint. No more than 33% random staining on 9in^2

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11
Q

SP-11 description

A

free of all VISIBLE oil grease dirt mill scale, rust paint. 3 levels (lvl 2 is default - lvl 1/2 no random staining allowed , lvl 3 only 5%.level 1 no residue is permitted in pit bottom, level 2 and level 3 have traces of corrosion in pit bottom

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12
Q

VIS 3 - guide and reference to hand/power tool (supplement to SSPC written procedures) “reference photos for SP2/3/11/15, illustrates 4 level of cleaniness - end conditions shown

A

A - mill scale 100%
B - rust / mill scale
C - 100% rust
D - 100% rust with pitted”

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13
Q

ISO 8501-1 std 2 - thorough hand and power tool cleaning

A

shall be free of from visible oil grease from POORLY adherely mill scall , rust, paint

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14
Q

ISO 8501-1 -std 3 - very thorough hand and power tool cleaning

A

same as std2, but surface shall be treated much more throughly to give a metallic sheen.

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15
Q

material is considered adherent if it cannot be be removed by a

A

DULL putty knife (not required in SP2/SP3)

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16
Q

important for hand tools to

A

feather to provide a smooth transition of the new applied coating

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17
Q

ISO 8504-3
ISO 8504-1

A

preparation of steel substrates before application of paints and related products part 3 for hand/power tools

ISO 8504-1 - same as above but general principles

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18
Q

power tools

A

rotary wire brushes / needle scaler/ rotary scalers / piston scalers/ grinders

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19
Q

hand tools

A

challenging physical location , difficult to reach area, sharp angles, weld slags, localized corrosions

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20
Q

Describe how abrasive blasting prepares a surface for coating application

A

abrasive blasting refers to the propelling of an abrasive media to clean, shape, roughen or smooth a surface

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21
Q

Identify the key components of blasting system and describe their function (11)

A

“1. Air compressor
2. Dyers
3. Blast pots
4. hoses ( service air/supply/bull or breathing air hose or blast hose)
5. couplings / whip check
6. deadman switch
7. nozzle - size 1/16”” , venturi/angled/ straight
8. in-line air filter
9. Co2 monitor
10. abrasive regulator valve - proper balance of abrasive being fed
11. main air inlet valve - start and stop flow of air”

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22
Q

NAce1 - SP5 -

A

white metal blasting - no evidence of adherent material or stainning

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23
Q

NACE2 / SP10 -

A

near white - SP6 + staining up to 5% on 9in^2

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24
Q

NACE3 / SP6 -

A

commercial blast - SP14 +
free of all visible mill scale, rust and paint + staining allowed up to 33% on 9in^2

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25
Q

NACE8/SP14 -

A

industrial blast - SP7 + tightly adherent mill scale up to 10% on 9in^2

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26
Q

NACE4/SP7 -

A

brush off- w/o magnification shall be free of all VISBLE oil, grease, dirt, dust and loose mill scale, rust, paint

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27
Q

SA 3 2 1/2 2 and 1 equivalent NACE / SP?

A

NAce1 - SP5 - white metal blasting - SA3
NACE2 / SP10 - near white - -SA 2 1/2
NACE3 / SP6 - commercial blast
NACE8/SP14 - indsutrial blast -SA 2
NACE4/SP7 - brush off -SA 1

28
Q

Vis1?

A

dry abrasive blasting visual guide

29
Q

Vis 3

A

power and hand tool cleaning

30
Q

ISO 8501-1 SA1

A

light blast cleaning - POORLY adhering mill scale, rust, paint

31
Q

ISO 8501-1 SA2

A

through blast clean - MOST mill scale,rust, paint

32
Q

ISO 8501-1 SA 2.5

A

very thorough blast cleaning - light stains only

33
Q

ISO 8501-1 SA3

A

blast cleaning to visual clean - uniform metallic color

34
Q

add WAB for

A

Wet abrsive blasting (same as dry abrasive)

35
Q

SSPC-VIS5/NACE VIS9

A

“visual guide for WAB
C = cover with rust little or no pitting visible
D = cover with rust with pitting visible
For SP6/SP10 only “

36
Q

flash rust types no flash rust / L / M / H

A

L - tightly adherent not easily remove by a cloth (yellow / brown)
M - reasonably well adherent leave light might on cloth (yellow / brown)
H - loosely adherent (red-yellow/brown)

37
Q

WJ

A

for waterjetting

38
Q

SSPC-VIS4 / NACE VIS 7

A

Initial and end conditions

39
Q

VIS4/VIS7 mirrors ISO 8501-4 for flash rust descriptions
ISO8501-4 classified mill scale as foreign matter, and may be present in WA1/2/and 2 1/2 not WA3

A
40
Q

NACE/SSSPC Written Standards

A

“WJ 1 - Clean to Bare Substrate - 0% for all
WJ 2 - Very thorough cleaning - loose material 0%, 5% tight and5% staining
WJ 3 - thorough Cleaning - loose material 0%, 33% tight and 33% staining
WJ 4- light cleaning - loose material 0%, 100% tight and staining”

41
Q

“WJ 1 -

A

Clean to Bare Substrate - 0% for all

42
Q

WJ 2 -

A

Very thorough cleaning - loose material 0%, 5% tight and5% staining

43
Q

WJ 3 -

A

thorough Cleaning - loose material 0%, 33% tight and 33% staining

44
Q

WJ 4-

A

light cleaning - loose material 0%, 100% tight and staining”

45
Q

ISO 8501-4 pictorial standards

A

WA 3 - water jetting to bare substrate 0 free of all
WA 2 1/2 - very thorough waterjetting - same as WA2 but light staining allows
WA 2 - thorough Waterjetting - free from all rust painting coating and other foreing material
Wa 1 - light waterjetting - w/o magnification shall be free of all VISBLE oil, grease, dirt, dust and loose or defenctive paint coatings loos ruse and other foreign material”

46
Q

“WA 3 -

A

water jetting to bare substrate 0 free of all

47
Q

WA 2 1/2 -

A

very thorough waterjetting - SLIGHT traces of rust and foreign matter

48
Q

WA 2 -

A

thorough Waterjetting - MOST of rust painting coating and other foreing material

49
Q

Wa 1 -

A

light waterjetting - w/o magnification shall be free of all VISBLE oil, grease, dirt, dust and loose or defenctive paint coatings LOOSE ruse and other foreign material”

50
Q

Outline the role of the inspector in the blasting process (6)

A

“1. known the required cleanliness
2. check the sensitive equipment and adjacent area have been protected
3. look for damage and unsafe equipment
4. verify the correct type and size of abrasive media is being used
5. check for abrasive media for contamination
6. verify the substrate temp is atleast 5 F above the dew point”

51
Q

dry abrasive blasting (pros/cons)

A

“pros - leaves a dry surface , fast and efficient
Cons - generates dust
must be recleaned prior to painting in order to meet the cleaning requirements “

52
Q

wet abrasive blasting (pros/cons)

A

“pros -no dust
cons - flash rust
types - vapor / slurry / halo water ring “

53
Q

water jetting (pros/cons)

A

“pros - less environmental impact, effective to remove thick film, and effect to clean removing soluable salts
cons - no surface profiles just maintain exisitng”

54
Q

3 tests

A

“1. blotter test - test compressor air is clean and dry and not contaminated
2. needle gauge test - very the pressure
3. nozzle aperture test - determine wears”

55
Q

mill scale is removed to

A

“avoid delamination / improve coating adhesion
eliminate source of galvanic corrosion (mill scale is cathode)”

56
Q

high pressure WJ 10K-30K psi
ultra high WJ >30K psi

A

the specified level of surface cleanliness must be achieved and maintained immediately prior to coating applications

57
Q

3 test methods for surface profiles “

A
  1. Comparators and coupons
  2. replica tape
  3. digital surface profile gauge”
58
Q

end conditions use what for hand / power

A

SSPC VIS3

59
Q

end conditions use what for dry abrasive blasting

A

SSPC VIS1 or ISO8501-1 SA 1 / 2 / 2.5/ 3

60
Q

end conditions use what for wet ab

A

SSPV VIS5/ NACE 9

61
Q

end conditions use what for WJ

A

SSPC VIS 4/ NACE VIS 7 - WJ1 / 2 /3/4 ISO 8501-4 WA1 / 2 / 2.5 / 3

62
Q

post blast clean-up (3)

A

“residue is clean up with
1, blowing down with clean, drycompressor air
2. vacuum clean
3. brusing with clean dry brush

Use duck tape test”

63
Q

Dust Tape test iso

A

ISO8502-3 - determine the amount and the size of the dust particle on surface (class 1-5)

64
Q

the specfied level of cleanliess must be maintained________the surface is coated

A

until

65
Q

what does not create a surface profile?

A

water jetting

66
Q

mill scale is removed to (3)

A

avoid delamination
improve coating adhesion
eliminate source of galvanic corrosion (mill scale is cathode)”

67
Q

high pressure WJ

A

10K-30K psi

NACE CIP1 (8 decks)

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