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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
NACE8/SP14 -
industrial blast - SP7 + tightly adherent mill scale up to 10% on 9in^2
26
NACE4/SP7 -
brush off- w/o magnification shall be free of all VISBLE oil, grease, dirt, dust and loose mill scale, rust, paint
27
SA 3 2 1/2 2 and 1 equivalent NACE / SP?
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
Vis1?
dry abrasive blasting visual guide
29
Vis 3
power and hand tool cleaning
30
ISO 8501-1 SA1
light blast cleaning - POORLY adhering mill scale, rust, paint
31
ISO 8501-1 SA2
through blast clean - MOST mill scale,rust, paint
32
ISO 8501-1 SA 2.5
very thorough blast cleaning - light stains only
33
ISO 8501-1 SA3
blast cleaning to visual clean - uniform metallic color
34
add WAB for
Wet abrsive blasting (same as dry abrasive)
35
SSPC-VIS5/NACE VIS9
"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
flash rust types no flash rust / L / M / H
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
WJ
for waterjetting
38
SSPC-VIS4 / NACE VIS 7
Initial and end conditions
39
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
40
NACE/SSSPC Written Standards
"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
"WJ 1 -
Clean to Bare Substrate - 0% for all
42
WJ 2 -
Very thorough cleaning - loose material 0%, 5% tight and5% staining
43
WJ 3 -
thorough Cleaning - loose material 0%, 33% tight and 33% staining
44
WJ 4-
light cleaning - loose material 0%, 100% tight and staining"
45
ISO 8501-4 pictorial standards
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
"WA 3 -
water jetting to bare substrate 0 free of all
47
WA 2 1/2 -
very thorough waterjetting - SLIGHT traces of rust and foreign matter
48
WA 2 -
thorough Waterjetting - MOST of rust painting coating and other foreing material
49
Wa 1 -
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
Outline the role of the inspector in the blasting process (6)
"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
dry abrasive blasting (pros/cons)
"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
wet abrasive blasting (pros/cons)
"pros -no dust cons - flash rust types - vapor / slurry / halo water ring "
53
water jetting (pros/cons)
"pros - less environmental impact, effective to remove thick film, and effect to clean removing soluable salts cons - no surface profiles just maintain exisitng"
54
3 tests
"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
mill scale is removed to
"avoid delamination / improve coating adhesion eliminate source of galvanic corrosion (mill scale is cathode)"
56
high pressure WJ 10K-30K psi ultra high WJ >30K psi
the specified level of surface cleanliness must be achieved and maintained immediately prior to coating applications
57
3 test methods for surface profiles "
1. Comparators and coupons 2. replica tape 3. digital surface profile gauge"
58
end conditions use what for hand / power
SSPC VIS3
59
end conditions use what for dry abrasive blasting
SSPC VIS1 or ISO8501-1 SA 1 / 2 / 2.5/ 3
60
end conditions use what for wet ab
SSPV VIS5/ NACE 9
61
end conditions use what for WJ
SSPC VIS 4/ NACE VIS 7 - WJ1 / 2 /3/4 ISO 8501-4 WA1 / 2 / 2.5 / 3
62
post blast clean-up (3)
"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
Dust Tape test iso
ISO8502-3 - determine the amount and the size of the dust particle on surface (class 1-5)
64
the specfied level of cleanliess must be maintained________the surface is coated
until
65
what does not create a surface profile?
water jetting
66
mill scale is removed to (3)
avoid delamination improve coating adhesion eliminate source of galvanic corrosion (mill scale is cathode)"
67
high pressure WJ
10K-30K psi

NACE CIP1 (8 decks)

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