1、BRITISH STANDARD CONFIRMED SEPTEMBER1979 BS 3698:1964 Specification for Calcium plumbate priming paints UDC 667.638.2:667.621.52:667.633.417.225BS3698:1964 This BritishStandard, having been approved by the Pigment, Paints and Varnishes IndustryStandards Committeeand endorsed by theChairman of the Ch
2、emicalDivisional Council, waspublished under the authorityof the General Councilon 15January1964 BSI 12-1999 The following BSI references relate to the work on this standard: Committee references PVC/2, PVC/2/10 Draft for comment D62/330 ISBN 0 580 35993 X Co-operating organizations The Pigment, Pai
3、nts and Varnishes Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Admiralty* Air Ministry* Association of British Chemical Manufacturers* Board
4、of Trade British Colour Makers Association* British Railways Board Crown Agents for Oversea Governments and Administrations* D.S.I.R.Building Research Station* D.S.I.R.Laboratory of the Government Chemist Incorporated Institute of British Decorators* Lead Oxide Convention London County Council* Lond
5、on Transport Board Ministry of Aviation* Ministry of Public Building and Works* National Federation of Builders and Plumbers Merchants* Oil and Colour Chemists Association* Paint Manufacturers and Allied Trades Association Paintmakers Association of Great Britain* Post Office* Research Association o
6、f British Paint, Colour and Varnish Manufacturers* Royal Institute of British Architects* Royal Institute of Public Health & Hygiene Titanium Pigment Manufacturers Technical Committee* War Office* White Lead Convention Zinc Development Association* Zinc Pigment Development Association The Government
7、 departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the Committee entrusted with the preparation of thisBritishStandard: Federation of Painting Contractors Gas Council Incorporated Association o
8、f Architects and Surveyors Institution of Municipal Engineers National Federation of Building Trades Employers National Federation of Master Painters and Decorators Amendments issued since publication Amd. No. Date CommentsBS3698:1964 BSI 12-1999 i Contents Page Co-operating organizations Inside fro
9、nt cover Foreword ii 1 Scope 1 2 Composition 1 3 Sample 1 4 Agreed sample 1 5 Consistency 1 6 Finish 1 7 Colour 2 8 Drying time 2 9 Flexibility and adhesion 2 10 Keeping properties 2 11 Marking 2 Appendix A Method for the determination of consistency 3 Appendix B Method for the preparation and coati
10、ng of panels 3 Appendix C Method for the determination of drying time 4 Appendix D Method of test for flexibility and adhesion 4 Figure 1 Bend test apparatus 5 Table I Composition of paints 1BS3698:1964 ii BSI 12-1999 Foreword This standard makes reference to the following BritishStandards: BS242, B
11、S243, BS259, Linseed oil for paints. BS245, White spirit. BS410, Test sieves. BS575, Carbon tetrachloride. BS580, Trichloroethylene (Types A and C). BS593, Laboratory thermometers. BS604, Graduated measuring cylinders. BS871, Abrasive papers and cloths for general purposes. BS1449, Steel plate, shee
12、t and strip. BS1733, Flow cups and methods of use. BS1795, Extenders for paints. BS2660, Colours for building and decorative paints. BS2920, Cold-reduced tinplate and cold-reduced black-plate. BS3699, Calcium plumbate for paints. The preparation of this BritishStandard was authorized by the Pigments
13、, Paints and Varnishes Industry Standards Committee in order to provide specifications suitable for the requirements of Government Departments, the Defence Services and other users. It was appreciated that calcium plumbate primers using media other than of the type specified in this specification ar
14、e manufactured, but it was considered that materials with compositions such as those given in the specification had the most general use. Two types of primer are specified, Type A and Type B. Type A is regarded as beingsuitable for general use as a primer for iron, steel and galvanized iron and Type
15、B, which has a lower calcium plumbate content than the Type A material, as being suitable for galvanized iron only. NOTEWhere metric equivalents are stated the figures in British units are to be regarded as the standard. The metric conversions are approximate. More accurate conversions should be bas
16、ed on the tables in BS350, “Conversion factors and tables”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from
17、legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to5 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front
18、 cover.BS3698:1964 BSI 12-1999 1 1 Scope This BritishStandard applies to calcium plumbate based priming paints for use on iron, steel, galvanized iron and other structural materials. 2 Composition The composition of the material shall conform to Type A or Type B as given in Table I. 3 Sample For exa
19、mination for compliance with this specification, representative samples of the material measuring not less than560ml shall be drawn either at the filling stage or from one or more original and previously unopened containers. The samples shall be placed in suitable, clean, dry, air-tight containers.
20、The containers shall be so filled as to leave an ullage of5per cent when closed. Each sample container so filled shall be marked with full details and date of sampling. The samples shall be stored in such a manner that the temperature does not vary unduly from the normal. Before examination, thoroug
21、hly mix the material and free it from coarse skins by passing through a suitable sieve. 4 Agreed sample Except where otherwise agreed between purchaser and vendor, the agreed sample referred to in Clause6 shall comply in all respects with the requirements of the other relevant clauses of this specif
22、ication. The sample shall measure not less than560ml and shall be packed in the manner specified in Clause3. 5 Consistency a) The material shall be in such a condition that stirring readily produces a smooth, uniform mixture suitable for application by brUsh. b) The material when tested by the metho
23、d described in Appendix A, shall have a flow time to collect50ml of not less than20seconds. 6 Finish When a film of the material, prepared by the method described in Appendix B, has dried for24hours, it shall be smooth, opaque, with a low gloss finish, free from sagging and wrinkling, and in no way
24、inferior to a film prepared in a similar way and at the same time from the agreed sample. Table I Composition of paints Constituents Type A Type B Per cent by weight Per cent by weight Calcium plumbate complying with BS3699 a 48min. 33min. Extenders complying with BS1795 b , excluding china clay or
25、any calcium carbonate compound (see Note1) 1518 3035 White spirit complying with BS245 c 15max. 15max. Stabilizing and suspending agents 1max. 1max. Linseed oil, complying with BS242, BS243, BS259 dor linseed stand oil, viscosity not exceeding30poises at25 C (see Note2) 1837 1637 Driers See Note3 NO
26、TE 1The extenders may consist of the commonly used extenders or mixtures thereof, but shall not include china clay or any calcium carbonate. Tinting pigments may be added where necessary, the amount of extender being correspondingly reduced. NOTE 2It is recommended that at least6per cent by weight o
27、f the material should be oil complying with BS242, BS243, orBS259 d . NOTE 3Driers may be added in order that the paint may comply with the drying requirements of the specification. Such driers shall not contain volatile material other than white spirit complying with BS245 c , which if present shal
28、l be included in the maximum percentage of white spirit specified above. Rosinate driers shall not be used. a BS3699, “Calcium plumbate for paints”. b BS1795, “Extenders for paints”. c BS245, “White spirit”. d BS242, BS243, BS259, “Linseed oil for paints”.BS3698:1964 2 BSI 12-1999 7 Colour When a fi
29、lm of the material prepared by the methoddescribed in Appendix B is examined24hours after application, its colour shallapproximate to the cream colour No.3040, orthe grey colour No.9100, of BS2660 1) . 8 Drying time The material when tested by the method described in Appendix C shall become surface-
30、dry in not less than4hours or more than8hours and hard-dry in not more than16hours. 9 Flexibility and adhesion The material when tested by the method described in Appendix D shall show no cracking or loss of adhesion. 10 Keeping properties The material when stored at normal room temperature in the o
31、riginal sealed containers shall retain the properties detailed above for a period of not less than12months, or for such other periods or at such other temperature, or both, as may be agreed between purchaser and vendor. 11 Marking Containers in which the material is packed shall be marked with the m
32、anufacturers name or trade mark, the number of this BritishStandard and the type, i.e.BS3698, Type . 1) BS2660, “Colours for building and decorative paints”.BS3698:1964 BSI 12-1999 3 Appendix A Method for the determination of consistency A.1 Apparatus a) Thermometer, schedule mark A40C/100 complying
33、 with BS593 2) . b) Flow cup, Type B4, complying with BS1733 3) . c) Graduated cylinder,50ml, complying withBS604 4) . d) Timing device, stop-watch or stop-clock. e) Stand, provided with means of levelling. f) Level gauge. g) Straight-edged scraper, for the top of the cup. A.2 Procedure Place the fl
34、ow cup on the stand in a place free from draughts and level it by the use of the level gauge placed on the rim. Thoroughly mix and strain the material into a clean container and adjust the temperature to meet the requirements specified below. This, and the following operations, should be carried out
35、 with the minimum delay to avoid loss of solvent. With the orifice closed by the finger, fill the cup with the sample until it just begins to flow over into the gallery, taking care to reduce the formation of air bubbles to the minimum. Free the surface from bubbles if any are present. Place the the
36、rmometer bulb in the cup, and check that the temperature is25 0.5 C. Place the scraper on the rim of the cup and draw it slowly across to remove the excess of material into the gallery. Place the graduated receiver under the cup, remove the finger from the orifice and simultaneously start the timing
37、 mechanism. When exactly50ml of the sample has been collected in the graduated receiver, stop the timing device and record the time taken. Appendix B Method for the preparation and coating of panels B.1 Materials required a) Test panels. i) Clean, mild steel plate,18s.w.g.(0.048in,1.02mm) in thickne
38、ss and measuring6in 4in(15cm 10cm), complying with the requirements of BS1449 5)for Grade En2A, and free from surface imperfections such as rolling marks, scores and scale. Store totally immersed in light neutral mineral oil, free from additives. ii) Clean tinplate, of substance108lb basis box thick
39、ness0.0118in (0.300mm) complying with BS2920 6) , and measuring6in 4in(15cm 10cm). iii) Clean tinplate, as above but measuring6in 2in(15cm 5cm). b) Solvent. Either carbon tetrachloride complying with BS575 7)or trichloroethylene complying with BS580 8) . c) Emery cloth No.0, complying with BS871 9)
40、. d) Linen rags, scoured and bleached. Alternatively lint-free cotton rags previously extracted with a suitable hydrocarbon solvent may be used. B.2 Preparation of panels for coating Roughly degrease the panels (in the case of mild steel panels after previously having wiped them free from excess oil
41、) with the carbon tetrachloride or trichloroethylene. Apply the emery cloth uniformly to the surface, rubbing lightly to avoid embedding abrasive in the surface. A suitable sequence of abrading operations for mild steel panels is as follows: i) Straight across the panel, in a direction parallel to a
42、ny one side. ii) At right angles to the first direction and until all signs of the original abrasion have been obliterated. 2) BS593, “Laboratory thermometers”. 3) BS1733, “Flow cups and methods of use”. 4) BS604, “Graduated measuring cylinders”. 5) BS1449, “Steel plate, sheet and strip”. 6) BS2920,
43、 “Cold-reduced tinplate and cold-reduced blackplate”. 7) BS575, “Carbon tetrachloride”. 8) BS580, “Trichloroethylene (Types A and C)”. 9) BS871, “Abrasive papers and cloths for general purposes”.BS3698:1964 4 BSI 12-1999 iii) With a circular motion, in circles of diameter approximately2inches, until
44、 a pattern consisting only of circular abrasion marks superimposed one upon another is produced. Remove traces of emery dust by wiping with the linen or cotton rag. Abrade tinplate panels with a circular motion, as iniii) only so that a smooth uniform surface is obtained. After abrading, degrease th
45、e panels by swabbing two or three times with the rag soaked in the carbon tetrachloride or trichloroethylene. Carry out the last swabbing with a clean piece of the rag soaked with clean solvent. Lightly dry the panels with a clean rag and if necessary warm very slightly to remove traces of condensed
46、 moisture, allow them to return to room temperature and then paint without delay. Take care that at no time between degreasing and painting are the prepared surfaces touched by hand or otherwise contaminated. B.3 Coating of panels Apply the thoroughly mixed material, by brush, to the panels to give
47、the following dry film weights: Expose the panels to dry in a vertical position in a well ventilated room at1521C(6070 F). Ensure that the painted surface is illuminated by diffused daylight for at least6hours during the drying period. NOTEIn order to avoid interference from excessive humidity, care
48、 should be taken throughout the drying process to ensure that the temperature of the room is above the dew point. Appendix C Method for the determination of drying time C.1 Material required Ballotini, which will pass through a sieve of nominal aperture210 (72mesh) 10)and be retained on a sieve of n
49、ominal aperture150 (100mesh) 10) . C.2 Procedure Prepare two6in 4in(15cm 10cm) mild steel or tinplate panels and coat them as described in Appendix B. Allow one panel to dry for8hours, place in a horizontal position and sprinkle the ballotini on to the surface of the film from a height of6in(15cm). After the ballotini have been left on the film for approximately1minute, brush it lightly with a camel hair brush and examine the film for signs of injury or adherence of ballotini. NOTE 1By the term “surface dry” is understood a condition of t
