SIGMAWElD MC - Boat Design Net

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00786813590SIGMAWELD <strong>MC</strong> 7177November 1999RECOMMENDEDSUBSTRATECOND/TIONSAND TEMPERATURES- steel; shot blast cleaned to ISQ-Sa2Y2 blasting profile (R); 40-70 ~ml- on steel blasted to above profile, the reGommendedft, 18 ~m,corresponds to 22 IJm as measured on a smooth test panel- minimum thickness for a closed film is 15 ~m measured on a smoothtest panel- substrate temperature may be up to max. 35°C- for automatic application a substrate temperature of 30°C isrecommended- the temperature of the substrate should be at least JoG above dew point- relative humidity during curing should be above 50%SYSTEM SPECIFICATION system sheet 3015primersSECONDARYSURFACEPREPARATION- during storage and construction, contamination of the prefabricationprimer should be limited- after fabrication, sur1ace defects should be treated according to thescheme below- where two possible sur1ace treatments are indicated, the choice oftreatmerit is dependent on the location and on the system to be applied(see system sheets)- the preferred pretreatment tor optimal results is shown; otherpossibilities are indicated in bracketsexposure conditionscontaminatlonweldseamsburned areasdamaged corroded areaswhite rust. cleaning by silicon carbide impregnatedimmersedto be removedISO-Sa2Y2(SPSS-Pt3)ISO-Sa21h(SPSS-Pt3)ISO-Sa2Y2(SPSS-Pt3)SPSS-ID Pt2(SCAP*)abrasive padatmosphericto be removedSPSS-Pt2SPSS-Ss(SPSS-Pt2)SPSS-Ss(SPSS-Pt2)SPSS-ID Pt1(SCAP -)Note that the back of welded plate may show discoloration (especially onplate where fillets have been welded on), this iS not to be confused withburned areas and do not reQuire special treatment. Burned through areasmay be present (this happens especially when welding thin steel) and theseshould then be treated as per "burned areas" above.
SIGMAWELD <strong>MC</strong>7177November 1 999INSTnUCTIONS FOn USEPot lifeAIRLESS SPRA VRecommended thinnerNozzle orificeNozzle pressureAIR SPRAYRecommended thinnerNozzle orificeNozzle pressureCLEANING SOLVENTSAFETY PRECAUTIONSMinimum ventilation airquantity required tor 1 litre ot:paintSigma thinner 90-53mixing ratio by volume: binder to paste 66,7: 33,3- the temperature ot the mixture of binder and paste should be above 15°C- stir the paste thoroughly before adding the binder- add gradually one third of the binder to the pigment paste- stir thoroughly till homogeneaus- add remaining binder and continue stirring until the mixture ishomogeneous- strain mixture through a 30-60 mesh screen- mixed paint is ready tor use- same addition of thinner (Sigma thinner 90-53, flash point 30°C) mightbe necessary depending on routing, line speed and steel temperature- agitate continuously during application24 hours at 20°Cno thinnerto be addedapprox. 0,43 - 0,53 mm (== 0,017 - 0,021 in)8 - 12 MPa (= approx. 80 - 120 bar; 1140 -1710 p.sno thinner'ta be added1 - 1 ,5 mm0,3 MPa (= approx 3 bar: 43 p.s.i.)recommended Sigma thinner 90-53 (flash point 30°C)gloves and fresh air mask recommended, see safety sheets 1430, 1431 andrelevant material safety data sheeta. to reach 10 % of LELb. to reach TLVa. to reach 10 % of LELb. to reach TLV= 112 m3= 1798 m3= 159 m3= 3501 m3
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SIGMAWElD MC - Boat Design Net

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