SAE AMS 79-017-2017 Compound Cleaning Foaming for Aircraft Surfaces.pdf

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1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there

2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Te

3、l: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS79_017 AEROSPACE MATERIAL SPECIFICATION AMS79-017 Issued 2017

4、-12 Compound, Cleaning, Foaming, for Aircraft Surfaces RATIONALE This Standard is a direct replacement for DEF STAN 79-17, Issue 2 and has been reproduced by SAE International under D/IPR Agreement D/IPR/04/CR-0239-17-0008. The technical content remains unchanged from Issue 2 of the Defence Standard

5、 it supersedes. Any queries should be referred via the link shown in the feedback box at the bottom of this page. LICENSING AGREEMENT Ministry of Defence Crown Copyright 2017. Data is reproduced with permission of the Controller, Her Majestys Stationery Office. The phrases “DStan“ and “Def Stan“, an

6、d the DStan logo, are registered trademarks of the Ministry of Defence. FOREWORD REVISION NOTE This Defence Standard was raised to Issue 2 to update its content and incorporate the latest MoD/DStan policy in place at the time. HISTORICAL RECORD This Standard supersedes the following: TS 10281A dated

7、 2 December 1988 Interim Def Stan 79-17 Issue 1 dated 14 June 1994 AMENDMENT ISSUED SINCE PUBLICATION Amendment 1, 6 February 2004, Clause 4, page 5 Revision Note: Test methods have been updated to reflect current procedures and terminology. SAE INTERNATIONAL AMS79-017 Page 2 of 21 TABLE OF CONTENTS

8、 1. SCOPE 3 2. WARNING . 3 3. RELATED DOCUMENTS . 3 4. DESCRIPTION 4 5. STORAGE LIFE 4 6. TEST METHODS 4 6.1 Test Conditions . 4 6.2 Composition 4 6.3 Condition . 4 6.4 Test Requirements 4 7. CONTAINERS AND MARKING OF CONTAINERS . 6 8. NOTES 6 8.1 Revision Indicator 6 ANNEX A STABILITY AND FOAMING 7

9、 ANNEX B FREEDOM FROM CRAZING ACTION . 8 ANNEX C DETERMINATION OF EASE OF RINSING 11 ANNEX D DETERMINATION OF CLEANING POWER 12 ANNEX E FREEDOM FROM CORROSIVE ACTION . 15 ANNEX F REMOVAL OF RESIDUE AFTER DRYING 17 ANNEX G FREEDOM FROM DAMAGE 18 ANNEX H EFFECT OF REPEATED CLEANING 19 ANNEX J STRESS C

10、ORROSION CRACKING 20 ANNEX K REMOVAL OF TEMPORARY CAMOUFLAGE ALKALI-REMOVABLE PAINT 21 Table 1 Test requirements . 5 SAE INTERNATIONAL AMS79-017 Page 3 of 21 1. SCOPE This SAE Standard specifies requirements for a foaming liquid cleaning compound which, when diluted with water 1:9 v/v, is suitable f

11、or cleaning the soiled exterior of Service aircraft. The cleaning compound may be applied by spraying, either as foam or liquid, by brushing or by swabbing. The surfaces to be cleaned may be unpainted metal or surfaces painted with glossy or matt schemes, including strippable acrylic paint complying

12、 with DTD 5599. This Standard includes tests to limit specific forms of corrosion that affect aircraft structural materials. 2. WARNING This section which appeared in DEF STAN 79-17 Issue 2 has been deliberately deleted. 3. RELATED DOCUMENTS 3.1 Reference is made in this Standard to: BS EN ISO 1513

13、Paints and Varnishes. Examination and Preparation of Samples for Testing BS EN ISO 1519 Paints and Varnishes, Bend Test (Cylindrical Mandrel) BS EN ISO 3696 Water for Analytical Laboratory Use. Specification and Test Methods BS EN 605 Paints and Varnishes. Standard Panels for Testing BS EN 2395 Alum

14、inium Alloy AL-P2014A-T4 or T42. Sheet and Strip 0.4 mm a 6 mm BS 846 Specification for Burettes BS 1449 Steel Plate, Sheet and Strip: Part 1 Carbon and Carbon-Manganese Plate, Sheet and Strip BS 1595 Propan-2-ol (Isopropyl Alcohol) for Industrial Use BS 3370 Specification for Wrought Magnesium Allo

15、ys for General Engineering Purposes. Plate, Sheet and Strip BS 3900 Methods of Test for Paints Part A13: Test for Flash/no Flash (Rapid Equilibrium Method) Part D8: Determination of Colour and Colour Difference: Principles Part D9: Determination of Colour and Colour Difference: Measurement Part D10:

16、 Determination of Colour and Colour Difference: Calculation Part E2: Mechanical Tests on Paint Films: Scratch Test BS 5690 Method for Determination of Abrasion Resistance of Fabrics BS 2L 95 Specification for Plate of Aluminium-zinc-magnesium-copper-chromium Alloy (Solution Treated, Controlled Stret

17、ched and Precipitation Treated) (Zn 5.8, Mg 2.5, Cu 1.6, Cr 0.15) BS 2L 500 Procedure for Inspection and Testing of Wrought Magnesium-base Alloys BS X 33 Two Component Epoxy Primer for Aerospace Purposes SAE INTERNATIONAL AMS79-017 Page 4 of 21 BS X 34 Air Drying, Two Component, Polyurethane Finish

18、for Aerospace Purposes Def Stan 03-19 Electro-deposition of Cadmium AMS03-19 Electro-deposition of Cadmium Def Stan 68-10 Corrosion Preventive, Water Displacing, NATO Code C-634 Joint Service Designation: PX-24 Def Stan 80-128 Paint, Finishing, Temporary Camouflage, Alkali Removable Def Stan 91-98 L

19、ubricating Oil, Gas Turbine Engine, Synthetic Grade 7.5 cSt NATO Code 0-149 Joint Service Designation OX-38 DTD 911 Protection of Magnesium-rich Alloys against Corrosion DTD 5592 Acrylic Sheets for Aircraft Glazing DTD 5599 Selectively Strippable Acrylic Finishing Schemes - Matt and Glossy - for Use

20、 on Aircraft ASTM G47 Determining Susceptibility to Stress-corrosion Cracking of High-strength Aluminium Alloy Products 3.2 This section which appeared in DEF STAN 79-17 Issue 2 has been deliberately deleted. 3.3 This section which appeared in DEF STAN 79-17 Issue 2 has been deliberately deleted. 4.

21、 DESCRIPTION The cleaning compound shall be a homogeneous solution, free from abrasive matter, visible impurities and objectionable odor. The residues of the material in the effluent resulting from aircraft cleaning shall not interfere with the biological treatment of sewage, assuming a final diluti

22、on of 4000:1 v/v. 5. STORAGE LIFE The cleaning compound, when stored in its original sealed containers at a temperature between 5 C and 35 C, shall retain the properties described in this Standard for a period, from the date of dispatch by the manufacturer, of not less than 24 months. 6. TEST METHOD

23、S 6.1 Test Conditions Unless otherwise specified, all tests shall be carried out at 23 C 2 C. 6.2 Composition Samples taken from any portion of the supply shall be of the same formulation as that of the original test sample. 6.3 Condition When the material in the original containers or in the labora

24、tory sample containers is examined in accordance with BS EN ISO 1513, it shall conform to Section 4. 6.4 Test Requirements A sample taken from any portion of the supply shall comply with the requirements of Table 1. If any sample is found not to conform to the requirements of this Standard, the whol

25、e batch may be rejected. SAE INTERNATIONAL AMS79-017 Page 5 of 21 Table 1 - Test requirements Test Number Property Requirement Method of Test 1 Stability and foaming Shall yield a solution or emulsion stable for at least 24 hours and free from insoluble precipitate matter. The volume of foam shall b

26、e at least twice the volume of the liquid both at one minute and at 2 hours. Annex A 2 Freedom from crazing action No crazing Annex B 3 Ease of rinsing Not more than 20 cm3of water to effect complete rinsing Annex C 4 Cleaning power Not inferior to the reference fluid by visual assessment Annex D 5

27、Freedom from corrosive action Increase in mass, 1 mg max Decrease in mass, 5 mg max No signs of etching, pitting or formation of adherent deposits Annex E 6 Flashpoint 55 C min BS 3900: Part A13 7 Removal of residue after drying No visible residue, change in mass not greater than the control using s

28、tandard hard water Annex F 8 Freedom from damage a. Bend test: The paint system shall not become detached or damaged b. Scratch test: The needle shall not penetrate the topcoat Annex G 9 Cleaning power (laboratory) dEd value no lower than the reference fluid Annex D 10 Cleaning power (field trial) T

29、o the satisfaction of the Customer Practical aircraft cleaning trial 11 Repeated cleaning Any damage not greater than the control using standard hard water Annex H 12 Stress corrosion cracking No stress corrosion cracking Annex J 13 Removal of temporary camouflage paint Complete removal Annex K SAE

30、INTERNATIONAL AMS79-017 Page 6 of 21 7. CONTAINERS AND MARKING OF CONTAINERS 7.1 Unless the form of packaging is specified in the contract or order, the cleaning compound shall be supplied in sound, clean and dry containers suitable for the product. The use of contaminated containers may render the

31、whole consignment liable to rejection. After filling, each container shall be securely closed. 7.2 Each container shall be legibly and durably marked according to legal and statutory requirements and with at least the following details: Designation viz: COMPOUND CLEANING FOAMING FOR AIRCRAFT SURFACE

32、S AMS79-017 Distinctive batch number: Contract or order number: Quantity of contents: Date of manufacture: Date of dispatch: Manufacturers name, initials or recognized trade mark: Any additional markings called for in the contract or order. 8. NOTES 8.1 Revision Indicator A change bar (l) located in

33、 the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions.

34、 Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY AMS COMMITTEE “J” SAE INTERNATIONAL AMS79-017 Page 7 of 21 ANNEX A - STABILITY AND FOAMING A.1 REAGENTS Standard hard water: Calcium acetate anhydrous 0.32 g 0.005 g Magnesiu

35、m sulfate heptahydrate 0.28 g 0.005 g Dissolve the calcium acetate and magnesium sulfate in 1 dm3of water complying with BS EN ISO 3696 Grade 3 (boiled and cooled). A.2 PROCEDURE A.2.1 Thoroughly clean and degrease all the glassware and dry completely before use. A.2.2 Dilute approximately 5 cm3of t

36、he cleaning compound 1:9 v/v with the standard hard water in a stoppered, 250 cm3measuring cylinder. A.2.3 Shake the cylinder vigorously for 1 minute. A.2.4 Place the cylinder on a flat surface and allow to stand for 1 minute and then determine the volume of the foam and liquid portions. A.2.5 Allow

37、 to stand for a further 2 hours and again determine the volume of the foam and liquid portions. A.2.6 Allow to stand for a further 22 hours and examine the liquid portion for signs of precipitation or separation of the solution. A.3 REPORTING Report the volume of foam and liquid portions at 1 minute

38、 and 2 hours and any insoluble precipitate matter formed or separation of the solution at 24 hours. SAE INTERNATIONAL AMS79-017 Page 8 of 21 ANNEX B - FREEDOM FROM CRAZING ACTION B.1 APPARATUS Air-circulating oven capable of maintaining 93 C 3 C Humidity cabinet capable of maintaining 23 C 2 C and 5

39、0% 5% relative humidity Panels of nominal dimension 180 x 25 mm cut from clear polymethylmethacrylate (PMMA) cast sheet, nominal thickness 6 mm, complying with DTD 5592 Jig for holding the panel across a fulcrum (see Figure B1) Stirrups for holding weights Lint or other absorbent fabric B.2 PROCEDUR

40、E B.2.1 Remove the protective paper from the panel by soaking in water and smooth the edges of the panel by abrading in the direction of the longest edge on a sheet of 220 grade silicon carbide paper. B.2.2 Cut a groove 2 mm radius parallel to the short edge and 15 mm from one end of the panel. This

41、 may be conveniently done by clamping two panels together and drilling a 4-mm diameter hole at the interface (see Figure B2). B.2.3 Anneal the panels by heating in an air-circulating oven at 93 C 3 C for 3 hours and then allow to cool at a rate of 27 C hour-1 5 C hour-1to 23 C 2 C. Condition the pan

42、el for at least a further 16 hours at 23 C 2 C and 50% 5% relative humidity (RH). B.2.4 Measure the width and thickness of the panels to the nearest 0.1 mm at a point 65 mm 1 mm from the non-grooved end of the panel. B.2.5 Mount the test panel in the jig and place a 20 mm square piece of lint or oth

43、er absorbent fabric soaked in the undiluted cleaning compound on top of the panel immediately above the fulcrum (see Figure B1). B.2.6 Place the stirrup in the groove and load to produce a stress of 21 MPa. The load used shall be calculated for each individual test panel from the following formula:

44、Lg6btSm2= (Eq. B1) where: m = total mass required in kg S = stress in MPa b = width of panel in mm t = thickness of panel in mm L = distance from the groove to fulcrum in mm g = gravitational acceleration m/s-2SAE INTERNATIONAL AMS79-017 Page 9 of 21 Under the conditions of the test, this reduces to

45、: 3210bt569.3m= (Eq. B2) or 2.280btm2= (Eq. B3) (For a test panel of exact dimensions, m = 3.212 kg) B.2.7 Allow the panel to remain under stress for a period of 8 hours, keeping the lint or absorbent fabric moistened with the undiluted cleaning compound. B.2.8 Remove weights and the panel from the

46、jig and examine the panel for crazing using oblique lighting. Ignore slight crazing initiated at the edges of the panel. B.3 REPORTING Report whether there is any crazing. Lint (20 x 20) soaked in test cleaner1090-15-00150 100 15ClampClampFulcrum support 12 diaStirrupLOAD (m kg)Dimensions in mmFigur

47、e B1 - Loading configuration SAE INTERNATIONAL AMS79-017 Page 10 of 21 1090-15-0024ClampClampFigure B2 - Method of drilling grooves SAE INTERNATIONAL AMS79-017 Page 11 of 21 ANNEX C - DETERMINATION OF EASE OF RINSING C.1 APPARATUS Panel 125 x 50 mm of acid chromate pickled hard aluminum complying wi

48、th and prepared in accordance with BS EN 605 and coated with a paint scheme complying with and applied in accordance with BS X 33 Type B primer with a finish to BS X 34 Type B (matt white). Allow the painted panel to dry for not less than 28 days at 23 C 2 C and 50% 5% RH after application of the fi

49、nal coat. Burette 50 cm3, complying with BS 846, class A C.2 REAGENTS Unless otherwise specified, all reagents shall be of analytical reagent grade. Phenolphthalein/propan-2-ol indicator solution 1 g in 100 cm3Water complying with BS EN ISO 3696, Grade 3 Standard hard water (see Section A.1) C.3 PROCEDURE C.3.1 Immerse the painted panel for 10 seconds in cleaning compound diluted 1: