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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1989 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001STANDARDSubmitted for recognition as an American National StandardJ1804R
4、EV.JUN89Issued 1987-06Revised 1989-06Superseding J1804 JUN87CORROSION PREVENTIVE COMPOUND, TOPSIDE VEHICLE CORROSION PROTECTION1. ScopeThis specification covers corrosion preventive compounds for spray application to vehicle bodycavities2. References2.1 Applicable Publications The following publicat
5、ions form a part of the specification to the extent specifiedherein. Unless otherwise indicated the lastest revision of SAE publications shall apply.2.1.1 ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM B 117-85Method of Salt Spray (Fog) TestingASTM
6、D609Method for Preparation of Steel Panels for Testing Paint, Varnish, Lacquar, and RelatedProductsASTM D 2247Practice for Testing Water Resistance of Coatings in 100% Relative HumidityASTM D 4585-86aPractice for Testing the Water Resistance of Coatings Using Controlled Condensation2.1.2 GENERAL MOT
7、ORS PUBLICATIONAvailable from General Motors, Boise Cascade, 13301 Stephens Road,Warren, MI 48089.GM99854702.1.3 Although this document contains reference to certain automotive industry tests, it only reflects interest inselecting what is felt to be the easiest and most useful tests for evaluation o
8、f topside cavity rust preventives.It does not suggest that the tests of other vehicle manufacturers are of lesser value or validity.2.1.3.1 Test MethodsSalt Spray ASTM B 117-85Detergent Resistance ASTM B 117-85QUV Aging ASTM B 117-85ImpactHigh Temperature FlowSCABSolvent Washoff POD VB 65-1 Maintena
9、nce Bulletin V-5-65MIL-C-62218ACleveland Condensing ASTM D 4585-86a (formerly ASTM D 2247 Annex A2)HumidityCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1804 Revised JUN89-2-3. Requirements3.1 QualificationCorrosion preventive compounds furnished under
10、this specification shall meet all theperformance requirements herein. These compounds shall not have an undesirable effect on the performanceof products used in the manufacture of the vehicle and with which the rust preventive is likely to come intocontact.3.1.1 Any change in formulation shall neces
11、sitate requalification.3.2 MaterialThe corrosion preventive compound may be a water based or solvent based product which is fluid,homogeneous, free from grit and abrasives, and non-toxic.3.3 Film CharacteristicThe corrosion preventive compound shall readily adhere to surfaces commonlyencountered in
12、underbody and inner body cavities of vehicles. The film shall not exhibit evidence ofalligatoring, cracking, peeling, blistering, humidity condensate wash-off, or other degradation.3.4 ColorNone specified.3.5 Sprayability and Low Temperature FluidityThe rust preventive compound shall be sprayable fr
13、om 10 to38 C (50 to 100 F).3.6 Condition in ContainerThe compound shall exhibit no settling, separation, skinning, or lumpiness.3.7 Low Temperature StabilityThe compound shall show no evidence of separation or nonhomogeneity at atemperature as low as 29 C (20 F).3.8 Manufacturers recommended applica
14、tion procedure(s) shall ensure that the film thickness required forperformance compliance with this specification be achieved in field application.3.9 When tested as specified, the compound shall conform to the following requirements at the manufacturersrecommended film thickness for actual field ap
15、plication.TABLE 1TEST TEST METHOD REQUIREMENTSalt Spray ASTM B 117-85 No more than 3 corrosion dots, each no larger than 1 mm (0.04 in) in diameter.Detergent Resistance ASTM B 117-85 1) No evidence of sagging or channeling and no more than a 10% area loss of the coating from the surface.2) No more t
16、han 3 corrosion dots, each no larger than 1 mm (0.04 in) in diameter.QUV Thermal Aging ASTM B 117-85 1) No surface failure such as peeling, cracking, alligatoring or blistering.2) No more than 3 corrosion dots, each no larger than 1 mm (0.04 in) in diameter.Reverse Impact Gardner No apparent loss of
17、 adhesion or cracking.High Temperature Flow Wet Refer to section 3.15 No failure at 121 C (250 F) at manufacturers recommended wet film thickness.Dry Refer to section 3.15 No failure at 150 C (302 F) at manufacturers recommended dry film thickness.SCAB Refer to section 3.16 1) Rating of 8 minimum.2)
18、 No more than 3 corrosion dots each no larger than 1 mm (0.04 in) in diameter.Solvent-Washoff POD VB65-1 Maintenance Bulletin V-5-65 MIL-C-62218AThe coating shall resist the washing action of its own solvent in enclosed areas. There shall be no evidence of washing, such as sagging, channeling, or re
19、moval of the coating from the test surface.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1804 Revised JUN89-3-3.10 Panel PreparationThe panels used for evaluation of rust preventives against this specification shall conformto ASTM D 609-73, Type 1, and
20、shall be prepared by Methods B or D according to that standard.3.11 Salt SpraySalt spray resistance shall be run in accordance with ASTM B 117-85.3.11.1 SCOPEThis test provides a method for measuring the corrosion resistance of a coating.3.11.2 Two steel panels, 100 mm x 300 mm x 0.8 mm (4 in x 12 i
21、n x 0.032 in) conforming to and cleaned asdescribed in 3.10, shall be used.3.11.3 The test surface of each panel shall be spray coated to the film thickness specified by the corrosionpreventive manufacturers or suppliers application procedure.3.11.4 The panel edges and backside of each panel shall b
22、e coated with the product under test.3.11.5 The coated panels shall be permitted to air dry for 7 days at 25 C 2 (77 F 5).3.11.6 The coated panels shall be unscribed, and exposed in salt spray for 1000 h as described in section 3.11.3.11.7 After exposure, the coating shall be stripped from the panel
23、s using an appropriate solvent and the surfaceexamined for compliance with the requirement in 3.9. Corrosion at the outer 6.35 mm (0.25 in) of the panelshall not be included in the panel rating.3.12 Detergent Resistance3.12.1 This test provides a method for measuring the resistance of the coating to
24、 removal by detergent wash and itsability to protect against corrosion after exposure to detergent washes.3.12.2 Two steel panels as described in 3.11.2 shall be coated as described in 3.11.3 and 3.11.4 and conditioned asdescribed in 3.11.5.3.12.3 The coated panels shall be immersed in detergent sol
25、ution at 50 C (122 F). (The detergent solution shallbe composed of 2.5 g/L of DuPont #7 Car Wash Compound or Bordens Rain Dance Car Wash.) Rinseunder spray nozzle (Spray Systems Co., Full Jet # 1/2 GG-25 or equivalent) at 50 C (122 F) watertemperature, 70 kPa (10 psi) water pressure and 250 mm (10 i
26、n) distance between the spray nozzle and thepanel per the following cycle:Immersion - 5 minRinse - 1 minImmersion - 10 minRinse - 2 minImmersion - 10 minRinse - 2 min3.12.4 Criteria for a pass shall be no evidence of sagging or channeling and no more than 10% loss of coating fromthe surface.Clevelan
27、d Condensing HumidityASTM D 4585-86a (formerly ASTM D 2247 Annex A2)1) No more than 3 corrosion dots, each no larger than 1 mm (0.04 in) in diameter.2) No film degradation such as alligatoring, cracking, peeling or blistering.TABLE 1 (CONTINUED)TEST TEST METHOD REQUIREMENTCOPYRIGHT Society of Automo
28、tive Engineers, Inc.Licensed by Information Handling ServicesSAE J1804 Revised JUN89-4-3.12.5 If the coated panels pass the detergent wash and rinse according to 3.12.4, they shall then be exposed insalt spray in accordance with ASTM B 117-85 for 168 h.3.12.6 After salt spray exposure, the panels sh
29、all be evaluated for compliance in the same manner as in 3.11.7.3.13 QUV Thermal Aging3.13.1 SCOPEThis test provides a method to determine the resistance of the coating to oxidative degradation.3.13.2 Two steel panels as described in 3.11.2 shall be coated as described in 3.11.3 and 3.11.4 and condi
30、tioned asdescribed in 3.11.5. For the apparatus which cannot take 100 mm x 300 mm x 0.8 mm (4 in x 12 in x 0.032in) panels, 75 mm x 300 mm x 0.8 mm (3 in x 12 in x 0.032 in) panels can be used.3.13.3 The coated panels shall be exposed for 100 h in the QUV cabinet using the following cycle:a. Ultravi
31、olet lights “on“Temperature : 50 C (122 F)Time : 8 hb. Ultraviolet lights “off“100% Humidity (condensing)Temperature : 46 C (114.8 F)Time : 4 hOne cycle = 12 h of exposure3.13.4 The cycle in 3.13.3 shall be repeated 8 times with the extra 4 h being ultraviolet exposure. Panel exposureshall always be
32、 started at the beginning of the ultraviolet light “on“ portion of the cycle.3.13.5 The criteria for passing the 100 h QUV exposure shall be no evidence of alligatoring, cracking, peeling, orblistering.3.13.6 If the coated panels pass QUV exposure, they shall be exposed to salt spray in accordance w
33、ith ASTM B117-85 for 336 h.3.13.7 After salt spray exposure, the panels shall be evaluated in the same manner as in 3.11.7.3.14 Impact3.14.1 SCOPEThis test provides a method to measure the adhesion of the coating to the substrate when subjectedto impact at low temperature.3.14.2 The apparatus used i
34、n this test is the Gardner Impact Tester or equivalent.3.14.3 Two steel panels as described in 3.11.2 shall be coated as described in 3.11.3 and conditioned as describedin 3.11.5.3.14.4 The coated panels shall be conditioned at 29 C (20 F) for 24 h. If possible, the Impact Tester shall alsobe condit
35、ioned at 29 C (20 F).3.14.5 The coated panels shall be impacted with a force of 2.3 J (20 in lb) on the uncoated side (reverse impact) ofthe panels. The impact test shall be carried out within 30 s after removal from the cold chamber.3.14.6 The criteria for meeting the requirement of this specificat
36、ion shall be no cracking or loss of adhesion.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1804 Revised JUN89-5-3.15 High Temperature Flow3.15.1 SCOPEThis test provides a method to determine the high temperature flow resistance of wet and dry filmsof th
37、e rust preventive.3.15.2 APPARATUS3.15.2.1 Multinotch Applicator3.15.2.1.1 The applicator is designed to lay down at least eight strips of coating of graduating thickness. The spacebetween the strips shall be 1.6 mm (0.0625 in). A typical applicator of this type is a Leneta Antisag Meteror equivalen
38、t.3.15.2.1.2 An applicator shall be chosen to draw down wet film thicknesses in the range recommended forapplication by the manufacturer or supplier.3.15.2.2 Oven3.15.2.2.1 A well ventilated, thermostatically controlled convection type oven shall be used. The oven shall becapable of being controlled
39、 through a temperature range of 20 C 3 to 150 C 3 (68 F 5 to302F 5).3.15.2.3 Test panels shall conform to ASTM D 609 Type 1 as described in 3.11.2 and shall be cleaned with mineralspirits as described in ASTM D 609 Method D.3.15.3 PROCEDURE3.15.3.1 Application of Film3.15.3.1.1 Sufficient rust preve
40、ntive shall be applied by spatula or eyedropper at one edge of the test panel to coverthe range of film thicknesses when applied by the multinotch applicator described in 3.15.2.11 and3.15.2.1.2.3.15.3.1.2 The multinotch applicator shall be drawn through the applied test material in one smooth movem
41、ent suchthat the strips of rust preventive left on the panel shall be straight and without any waviness.3.15.4 WET FILM PERFORMANCE3.15.4.1 Immediately after the coating has been drawn down as in 3.15.3.1.1 and 3.15.3.1.2, the test panel shall beplaced vertically such that the rust preventive strips
42、 are horizontal to the ground and with the thickest stripin the lowest position. The panel shall be left in this position for 5 min at 25 C 3 (77 F 5).3.15.4.2 The test panel shall then be placed vertically in an oven as described in paragraph 3.15.2.2 at 121 C 3(250 F 5) for 20 min. The thickest st
43、rip shall be in the lowest position.3.15.4.3 Evaluation of ResultsAfter removal of the test panel from the oven exposure described in 3.15.4.2, thestrip of coating which sags or flows sufficiently to cross into the next thicker strip of coating shall beconsidered the thickness at which failure occur
44、s. There shall be no failure at the manufacturers orsuppliers recommended wet film thickness.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1804 Revised JUN89-6-3.15.5 DRY FILM PERFORMANCE3.15.5.1 Immediately after the film has been applied and drawn-dow
45、n, as in 3.15.3.1.1 and 3.15.3.1.2, the testpanel shall be placed vertically such that the rust preventive strips are horizontal to the ground and with thethickest strip in the lowest position. The test panel shall be stored in this position for 7 days at 25 C 3(77 F 5).3.15.5.2 The test panel shall
46、 then be placed vertically in an oven as described in 3.15.2.2.1 at 150 C 3 (300 F 5) for 20 min. The thickest strip shall be in the lowest position.3.15.5.3 Evaluation of ResultsAfter removal of the panel from the oven exposure described in 3.15.5.2, the stripof coating which sags or flows sufficie
47、ntly to cross into the next thicker coating shall be considered thethickness at which failure occurs. There shall be no failure at the manufacturers or suppliersrecommended dry film thickness.3.16 SCAB Test3.16.1 SCOPEThis test provides a method of measuring the corrosion resistance of a coating.3.1
48、6.2 Two steel panels as described in 3.11.2 shall be coated as described in 3.11.3 and 3.11.4 and conditioned asdescribed in 3.11.5.3.16.3 After conditioning panel as described in 3.11.5 and prior to exposure, each test surface shall be diagonallyscribed to 25 mm (1 in) from either corner. A straigh
49、t edge shall be used to guide the scribing instrument,which can be a carbide tip scribe tool or a sharp knife. The scribe shall be made with sufficient pressure tocut completely through the coating and expose a bright line of bare metal.3.16.4 Place the test panels with the 300 mm (12 in) dimension horizontal in a suitable wood or plastic rack. Therack shall hold panels at a 0 to 15 deg angle from the vertical and the panels shall be spaced a minimum of13 mm (0.5 in) apart.3.16.5 The racked
