NESM0141-2012 Methods of Test for Coating of Synthetic Resin对合成树脂涂料试验方法

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NESM0141-2012 对合成树脂涂料试验方法
1. Scope ..................................................................... 2
2. Definition of terms................................................... 2
3. Test method classification ...................................... 2
4. General test method information ............................ 4
4.1 Test area conditions.......................................... 4
4.1.1 Painting room ............................................. 4
4.1.2 Testing room .............................................. 4
4.2 Test plate shape and dimensions ..................... 4
4.3 Test specimen preparation method................... 5
4.3.1 Test plate preparation method.................... 5
(1) Materials..................................................... 5
(2) Molding and fabrication .............................. 5
(3) Test plate pre-treatment ............................. 5
4.3.2 Test material sampling methods................. 5
(1) Undiluted solution test material sampling ... 5
(2) Sample of test piece................................... 6
4.3.3 Painting ...................................................... 6
(1) Test plate painting ...................................... 6
(A) Spray painting method............................ 6
(B) Electrostatic painting method ................. 6
(C) Other painting methods.......................... 6
(2) Coat hardening........................................... 6
(3) Coat curing ................................................. 6
(4) Coat thickness............................................ 6
(5) Coat thickness measurement ..................... 7
(6) Painting procedure ..................................... 7
4.4 Time lapse between test completion and
test result confirmation...................................... 7
5. Paint materials testing method ............................... 8
5.1 Offensive odor................................................... 8
5.2 Paint container conditions................................. 8
5.3 Opacity rating.................................................... 9
5.4 Specific gravity................................................ 10
5.5 Non-volatile content ........................................ 12
5.6 Viscosity.......................................................... 13
5.7 Sedimentation ................................................. 15
5.8 Storage stability .............................................. 16
5.9 Paint conductivity ............................................ 17
5.10 Pot life ........................................................... 17
5.11 Drying characteristics.................................... 17
5.12 Residual thermosetting paint......................... 18
6. Coat test methods ................................................ 19
6.1 External conditions.......................................... 19
6.1.1 Paint surface ............................................ 19
6.1.2 Gloss ........................................................ 19
6.1.3 Non-sand recoat characteristics ............... 20
6.1.4 Dust resistance characteristics................. 21
6.1.5 Color disparities........................................ 22
6.1.6 Overbaking resistance characteristics ...... 26
6.1.7 Welding line and gate portion paint
external appearance................................. 26
6.1.8 Brilliance................................................... 27
6.2 Physical properties...........................................29
6.2.1 Pencil scratch test .....................................29
6.2.2 Impact resistance characteristics ..............30
6.2.3 Chipping resistance characteristics ...........31
6.2.4 Adhesive characteristics............................42
6.2.5 Thermal non-adhesive characteristics .......46
6.2.6 Abrasiveness............................................... 47
6.2.7 Bending and twisting resistance
characteristics.............................................. 48
6.2.8 Abrasion resistance characteristics ............. 49
6.2.9 Scratching resistance characteristics .......... 53
6.2.10 Dry wiping resistance characteristics......... 57
6.2.11 Top-coat paint film inside stress cracking
characteristics ........................................... 60
6.2.12 Bumper handling characteristics................ 61
6.2.13 High pressure washing resistance in
Russian market ....................................... 112
6.3 Chemical properties ............................................ 62
6.3.1 Moisture resistance characteristics.............. 62
6.3.2 Acid resistance characteristics .................... 68
6.3.3 Alkali resistance characteristics................... 69
6.3.4 Gasoline resistance characteristics ............. 69
6.3.5 Engine oil resistance characteristics............ 69
6.3.6 Paint surface protective agent resistance
characteristics.............................................. 70
6.3.7 Rust preventive agent resistance
characteristics ............................................. 70
6.3.8 Heat cycle resistance characteristics........... 71
6.3.9 Thermal resistance characteristics .............. 74
6.3.10 Hot water resistance characteristics .......... 74
6.3.11 Antifreeze solution resistance
characteristics............................................ 75
6.3.12 Wax resistance characteristics .................. 75
6.3.13 Washer fluid resistance characteristics ..... 75
6.3.14 Detergent resistance characteristics.......... 76
6.3.15 Artificial perspiration resistance
characteristics............................................ 77
6.3.16 Iron filings exposure-caused damage
resistance characteristics .......................... 78
6.3.17 PVC adhesive resistance
characteristics ........................................... 81
6.3.18 Bird dropping resistance characteristics .... 82
6.3.19 Paint surface conductivity resistance
values........................................................ 84
6.3.20 Jelly percentage ........................................ 85
6.3.21 Acid rain resistance characteristics ........... 86
6.3.22 Paint film yellowing resistance
characteristics ............................................ 88
6.3.23 Insect resistance characteristics................ 89
6.3.24 Pollen resistance characteristics ............... 90
6.3.25 Sap resistance characteristics ................... 90
6.3.26 Paint film moisture permeability................. 91
6.3.27 2-Sided tape adhesion test........................ 93
6.3.28 White stain resistance ............................... 96
6.3.29 Dirt resistance characteristics.................... 96
6.4 Long range properties ......................................... 98
6.4.1 Weathering resistance characteristics .......... 98
(A) Natural exposure ...................................... 98
(B) Accelerated exposure ............................. 101
6.4.2 Sunlight resistance characteristics.............. 108
(A) Natural exposure .................................... 108
(B) Accelerated exposure............................. 109
6.5 Durability .......................................................... 110
6.5.1 Scratch resistance durability .................... 110
ANNEX.............................