01-01!14!1 dry blasting

AIRBUS INDUSTRIEPROCESS AND MATERIAL SPECIFICATION

PROCESS SPECIFICATION

01-01-14-1

DRY BLASTING

Printed in Germany

AIRBUS IHDUSTRIEPROCESS AND MATERIAL SPECIFICATION

RECORD OF REVISIONS

Printed in Germany

ROR 01-01-14-1Page 1Feb 01/87

REV . ISSUE INSERTED REV . ISSUE INSERTED

NO . DATE DATE BY NO . DATE DATE BY

01 Aug 01/95


LIST OF EFFECTIVE,PAGES

SUBJECT

PAGE DATE

Printed in Germany

RECORD OF REVISION

LIST OF EFFECTIVE PAGES

TABLE OF CONTENTS

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SUBJECT

1 . GENERAL

1 .1 Scope1 .2 Limitations of use1 .3 Health and safety statement

2 . EQUIPMENT AND MATERIALS

2 .1 Equipment2 .2 Materials

3 . PROCESS

3 .1 Flow chart3 .2 Degreasing3 .3 Masking3 .4 Dry blasting3 .5 Cleaning3 .6 Subsequent treatments

4 . QUALITY REQUIREMENTS

4 .1 Visual inspection4 .2 Material inspection4 .3 Equipment control4 .4 Process control

5 . REFERENCED DOCUMENTS

Appendix 1Appendix 2


TABLE OF CONTENTS

Printed in Germany

1 . GENERAL

1 .1 Scope

AIRBUS IHDUSTRIEPROCESS AND MATERIAL SPECIFICATION

This Document shall not be used as a basis for manufacture and supply oforiginal and replacement parts to AIRBUS INDUSTRIE unless specificallyrequired in a contract or purchase agreement .

This specification establishes the requirements and defines the necessaryoperations for the abrasive cleaning of materials by means of dryblasting .

1 .2

Limitations of use

This process is not applicable for forming operations nor for removal ofsurface defects .

Silicon carbide shall not be used for the cleaning of aluminum parts,nor alumina for metals which are to be welded . Clad or annealed aluminumparts shall not be blasted, except when specifically indicated in thedrawing .

Dry blasting shall be performed after any required dye penetrantinspection .

1 .3

Health and safety statement

This specification does not necessarily detail the precautions necessaryto meet the requirements of health and safety .

It is the responsability of the user of this specification to consultand establish appropriate health and safety precautions and the methodshould be operated only by trained personnel .

2 . EQUIPENT, MATERIALS

2 .1 Equipment

The dry blasting equipment is to be fitted with :

A device for entraining the abrasive in a high velocity stream ofair .

-

Controls to regulate the pressure of the compressed air used forblasting .

A separator system to remove oil and water from the air supply usedfor blasting .

Means to direct the stream of abrasive .

- An abrasive recirculation system which includes filtration to removedust and scale .

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2.2 Materials

3 . PROCESS

3.1

Flow chart


ALumina (free of lead and it will not contain more than 0.1% ofiron) (see Appendix 1, Table 4) .

Silicon carbide (see Appendix 1, Table 4) .

Steel grit (see Appendix 1, Table 5) .

Glass microbeads (see Appendix 2, Table 6) .

Degreasingper PMS 01-01-01

Masking

Dry blasting

Cleaning

Subsequenttreatments

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3 .2 Degreasing

3 .3 Masking

3 .4

Dry blasting

AIRBUS 1NDUSTRIEPROCESS AND MATERIAL SPECIFICATION

It shall be performed per PMS 01-01-01 and its purpose is to avoidabrasive contamination .

Part areas which could be damaged during the dry blasting shall bemasked prior to the start of the process .

A choice of abrasive shall be made to suit the material to be blastedand the operation to be carried out .

For information, Table 1 and Appendix 2 give a list of abrasives andglass microbeads and their sizes for dry blasting .

The relevant Design Authority shall determine the applicability for thisprocess, the use of other abrasives and the corresponding sizes dependingon the different types of materials to be processed .

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AIRBUS WDUSTRIEPROCESS AND MATERIAL SPECIFICATION

Abrasives and grain sizes used for dry blastingTable 1

(1) Grit shall be used to remove the oxide after treatment and blastingwith glass microbeads (400) shall also be performed before performingelectrolytic plating .

The stream of abrasive must be directed so that the centre Line of thestream form an angle of Less than 45 with the surface for parts withthickness below 2 .5 mm, and use an angle of 45 - 90 for parts withthickness over 2 .5 mm .

During blasting, the nozzle must traverse at a constant rate . Adjust thetreatment time to produce the surface finish required .

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Abrasives and standardized grit sizesMaterials Operation

to be blasted Steel grit ALumina Silicon Glass(mesh) carbide microbeads(mesh) (mesh)

Steels of Descaling and G25-G200 36-180 36-240 170-400strengths below debarring1500 MPa except General cleaning G40-G80 180 or 180 or 170-400threaded parts finer finerand springs with Cleaning beforedia . > 2 mm resistance G40-G80 --- --- 170-400

weldingSteels of Cleaning beforestrengths over electrolytic G80 (1) 80-180 --- 4001500 MPa except plating or othersprings with processesdia . < 2mmThreaded or Cleaning beforefilleted areas electrolytic --- 180 or --- 400of ferrous plating or other fineralloys processesNon-ferrous Rough machining --- 100-240 180-240 170-400alloys including and descalingmagnesium except General cleaning --- 180 or 180 or 170-400threaded areas finer finerand springs Surface

preparation ofnickel and G40-G200 --- --- 170-400

cobalt alloysfor welding

Aluminum alloys Descaling and --- 100-240 --- 170-400deburring

General cleaning --- 180 or --- 170-400finer

Titanium alloys General cleaning --- 180 or --- 400 orwith thickness finer finer> 1 .6 mmStructural Light abrasion --- --- --- 400plastic parts

3 .5 Cleaning

3 .6

Subsequent treatments

3 .6 .1 Aluminum alloys

3 .6 .2 Titanium alloys


After the dry blasting process, the parts must be cleaned by blowingwith dry and filtered pressure air .

When the parts are not to be treated within 8 hours, or 2 hours formagnesium alloys, after dry blasting process, they must be protected withan approved anti-corrosion protection . This temporary protection may bepreceded by a chemical treatment, according to the following procedures,when required by the relevant Design Authority .

NOTE : Care must be taken in the choice of temporary protective where itcould be detrimental to subsequent processing eg . bonding orpainting .

The treatment may be carried out by one of the following processes :

Passivation with bichromate solution 25 mg/L at 60 - 70 C for5 - 10 minutes .

Sulfochromic pickling per PMS 01-01-06 .

Chromating per PMS 01-02-05 .

Perform an immersion in nitric acid (40 - 42 Be) 35 - 45% in volume, atroom temperature for 20 - 60 minutes . Then rinse and dry the parts .

3 .6 .3 Magnesium alloys

Perform an immersion into a chromic acid solution 160-200 g/L at75 5 C for 2 - 10 minutes . Then rinse and dry the parts .

3 .6 .4 Stainless steels

Perform an immersion into the solution of Table 2, and rinse the partsin a bath of water Class B, according PMS 01-01-18 for at least3 minutes .

Table 2

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COMPONENTSCONCENTRATIONS

TIMEMAKE-UP CONTROL

TEMPERATURE( 0 0 (minutes)(for 100 L)

Nitric acid 40 - 42 Be 27 L 200 - 250 g/L

Sodium dichromate 2 .7 kg 20 - 30 g/L

CL --- 50 mg/L (max .) 50 - 55 20 - 40

Deionized water Remainder ---

4 . QUALITY REQUIREMENTS

4 .1

Visual inspection

4 .2 Material inspection

4 .2 .1 Abrasive control

4 .2 .2 Size control

4 .3

Equipment control


Subsequently, they shall be immersed into the solution of Table 3 andrinsed in a bath of water Class B, according to PMS 01-01-18 for atleast 3 minutes .

Table 3

Quality Assurance shall verify compliance with the requirements of thisspecification .

The control covers the materials, equipments and the process .

All dry blasted parts shall be visually inspected . Check that thetreatment has been applied to the whole surface of the parts and thatthese remain free of grease, corrosion, abrasives and other contaminants

The surfaces must be uniformly smooth and they must not presentdistorsion, notches or other defects . The parts must meet the dimensionaland roughness requirements established in the drawings .

The type of the abrasive used, shall be in accordance with therequirements of this specification . Checking that the same abrasive isnot used for different materials .

Screen and clean or replace abrasives (alumina and glass microbeads) asoften as necessary to remove undersize material and contaminants .

Check that the blasting chambers are free of oxides which mightcontaminate the abrasives and that the material of the nozzles aresuitable and unobstructed .

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COMPONENTSCONCENTRATIONS

TEMPERATURE TIMEMAKE-UP CONTROL ( 0 C) (minutes)

(for 100 l)Sodium dichromate 5 kg 40 - 60 g/l

Deionized water Remainder --- 60 - 70 30 - 40

4 .4

Process control

Check that the pressure is correctly applied and that the angle iscorrect in each case, as established in para . .3 .4 and the time asrequired . Check also the correct masking of those areas indicated on thedrawings .

5 . REFERENCED DOCUMENTS


PMS 01-01-01

Degreasing using chlorinated solvent in vapour phase

PMS 01-01-06

Acid pickling of aluminum alloys

PMS 01-01-18

Water for chemical treatment

PMS 01-02-05

Chromating of aluminum and aluminum alloys

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Alumina and silicon carbide size and screen requirementsTable 4

Steel grit size and mesh requirementsTable 5

Appendix 1

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Screen_Abrasive Grade Size All Retained Accumulated Passingtype No . passing

% max . /. min, /. min . 5% max .m (No .)(Screen No .) (Screen No .) (Screen No .) Nm

(No .)

(35)1 and 3 A 36 1000 (18) 15 (25) 50 (35) 80 and 300 (50)

(40)(120)

1 and 3 B 100 250 (60)25 (100) 30 (120) 55 and 63 (230)(140)

(200) (200)1 and 3 C 180 180 (80) 20 (170) 30 and (230)

(230) 60 and ---(270)

(230) (230)2, 6 D 240 125 (120) 10 (200) 5 and (270)and 7 (270) 30 and ---

(325)

Standard Sizesscreen

G 25 G 40 G 50 G 80 G 120 G 200 G 325/am (No .)1180 (16) 0% (All

passing)1000 (18) 0% (All

passing)710 (25) 70% 0% (All Minimal %

passing) accumulated inweight

425 (40) 80% 70% 0% (Allpassing)

300 (50) 80% 65% 0% (Allpassing)

180 (80) 75% 65% 0% (Allpassing)

125 (120) 75% 60% 0% (Allpassing)

75 (200) 70% 55%53 (325) 65% 20%

AIRBUS IIVDUSTRIEPROCESS AND MATERIAL SPECIFICATION

Size and screen requirements for glass microbeadsTable 6

Appendix 2

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Head size - X round min . '- % passingusSTD

1 2 3 4 5 6 7 8 9 10 11 12 13

Screen 60%Round

60%Round

65Y.Round

707:Round

70%Round

80%Round

807:Round

80%Round

80%Round

90%Round

90%Round

90%Round

95%Round

Mesh

10 10012 95-100 10014 0-15 95-100 10020 0-5 0-15 95-100 10030 0-5 0-15 95-100 10040 0-5 0-15 95-100 10050 0-5 0-15 95-100 10060 0-5 95-100 10070 0-15 95-100 10080 0-5 0-15 95-100 100100 0-5 0-15 95-100 100120 0-5 0-15 95-100 100140 0-5 95-100 100170 0-15 95-100200 0-5 0-15230 0-5 0-15325 0-5 0-15400

I f ~ . 0-5

Front PagesTitle PageRevision Transmittal SheetHighlightsRecord of Revisions

IntroductionCross Reference ListAlphabetical IndexAlphanumerical IndexChapter 01 - ProcessesList of Effective Pages01-01..01-01-0101-01-0201-01-0301-01-0401-01-0501-01-0601-01-0701-01-0801-01-0901-01-1001-01-1101-01-1201-01-1301-01-14-101-01-14-201-01-1501-01-1601-01-1701-01-1801-01-1901-01-2001-01-2101-01-2201-01-2401-01-2501-01-2701-01-28

01-02..01-02-0101-02-0201-02-0401-02-0501-02-0701-02-0801-02-0901-02-1001-02-1101-02-1201-02-1301-02-1601-02-2101-02-2201-02-2301-02-2401-02-2501-02-2701-02-2901-02-3001-02-3101-02-3201-02-3501-02-3601-02-3701-02-3801-02-3901-02-4001-02-4101-02-4201-02-4301-02-4401-02-4501-02-4701-02-4801-02-5301-02-10001-02-10101-02-10201-02-10301-02-10401-02-105

01-03..01-03-0201-03-0301-03-0401-03-0501-03-0601-03-0701-03-0801-03-0901-03-1001-03-1101-03-1201-03-1301-03-1401-03-1501-03-1601-03-1701-03-1801-03-1901-03-2001-03-2101-03-2201-03-2301-03-2401-03-2501-03-2701-03-2901-03-3101-03-3301-03-3401-03-3501-03-36

01-04..01-04-0101-04-0201-04-0801-04-0901-04-1701-04-1801-04-1901-04-2001-04-2101-04-2301-04-2401-04-2501-04-2601-04-2801-04-2901-04-3001-04-3101-04-3201-04-3301-04-3401-04-3601-04-3701-04-3801-04-4001-04-4501-04-4601-04-4801-04-5001-04-5101-04-5301-04-5401-04-5501-04-5601-04-5701-04-58

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01-07..01-07-0101-07-0401-07-0501-07-0601-07-0701-07-0801-07-0901-07-1001-07-1101-07-1201-07-1301-07-1401-07-1501-07-1601-07-1701-07-1901-07-2001-07-2101-07-2201-07-2301-07-2401-07-2501-07-2601-07-2701-07-2801-07-2901-07-3001-07-3101-07-3201-07-3301-07-3401-07-3501-07-3601-07-3701-07-3801-07-3901-07-4001-07-4201-07-4401-07-4501-07-4601-07-4701-07-4801-07-4901-07-5001-07-5201-07-5301-07-5401-07-5501-07-5601-07-5701-07-5801-07-5901-07-6001-07-6201-07-6301-07-6401-07-6501-07-6701-07-6801-07-6901-07-7001-07-7101-07-7201-07-7301-07-7401-07-7501-07-7601-07-7701-07-7801-07-7901-07-8001-07-8101-07-8301-07-8401-07-8501-07-8601-07-8701-07-8801-07-8901-07-9001-07-9201-07-9301-07-9401-07-9501-07-9601-07-9701-07-9801-07-9901-07-10001-07-10101-07-10201-07-10301-07-104

01-08-00

Chapter 02 - MaterialsList of Effective PagesTable of ContentsMaterial Cross Reference List02-00-0102-01-0002-02-0002-03..02-03-0002-03-0102-03-0202-03-0302-03-0402-03-0502-03-0602-03-0702-03-0802-03-0902-03-1002-03-1102-03-1202-03-1302-03-1402-03-1502-03-1602-03-1702-03-1802-03-1902-03-2002-03-2102-03-2202-03-2302-03-2402-03-2502-03-2602-03-2702-03-2802-03-2902-03-3002-03-3102-03-3202-03-33

02-04..02-04-0002-04-0102-04-0202-04-0302-04-0402-04-05

02-05..02-05-0002-05-0102-05-0202-05-0302-05-0402-05-0502-05-0602-05-0702-05-0802-05-0902-05-1002-05-1102-05-1202-05-1302-05-1402-05-1502-05-1602-05-1702-05-18

02-06..02-06-0002-06-0102-06-02

02-07..02-07-0002-07-0102-07-0202-07-0302-07-0402-07-0602-07-0702-07-0802-07-0902-07-1002-07-11

02-08..02-08-0002-08-0102-08-0202-08-0302-08-0402-08-0502-08-0602-08-0702-08-0802-08-0902-08-1002-08-1102-08-12

02-09..02-09-0002-09-0102-09-0202-09-0302-09-0402-09-05

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02-11..02-11-0002-11-0102-11-0202-11-0302-11-0402-11-0502-11-0602-11-0702-11-0802-11-0902-11-1002-11-1102-11-1202-11-1302-11-1402-11-15

02-12..02-12-0002-12-0102-12-0202-12-0302-12-0402-12-0502-12-0602-12-0702-12-0802-12-0902-12-1002-12-1102-12-1202-12-1302-12-1402-12-1502-12-16

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01-01!14!1 dry blasting

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