涂層破損面積計算

1、ASSESSMENTCALCULATIONMETHODOFCOATINGDAMAGEDAREASFBALLASTTANKSOFSHIPSFewdMSC.215(82)prescribesthepreparationofsteelsubstratesbefeapplicationofpaintsrelatedproductsfballasttanksofships:oSa2withabrasiveblastingduringblockco

2、atingosurfacetreatmentofbutts(aftererection)shallbecarriedoutbymeansoftoolgrindingosmalldamagesupto2%oftotalarea:St3.oContiguousdamagesover25m2over2%ofthetotalareaofthetankSa2shouldbeapplied.Thisguidancenotesisdrawninder

3、tosatisfywiththedemsofmodernshipbuildingstardofIMOduetothereisnoassessmentcalculationmethodofcoatingdamagedareasfballasttanksofshipsalloverthewld.MSC.215(82)對船舶壓載艙涂覆涂料前鋼材表面處理規(guī)定：?分段涂裝時必須采用噴丸（砂）處理達到Sa2級；?合攏后表面處理允許合攏對接縫采用工具

4、打磨，?小范圍破損面積總和不超過全艙面積2％：St3級，?緊鄰破損區(qū)域的總面積超過25m2或超過全艙面積2％：Sa2級。由于均沒有涉及壓載艙涂層破損面積的評估與計算方法標準，為滿足現(xiàn)代造船的需求，適應(yīng)IMO標準規(guī)定，特制定本指導(dǎo)性文件。ScopeThisguidancenotesprescribethestsdefinitionsofcoatingdamagesfballasttanksofshipstheassessmentcalcu

5、lationmethodofdefectiveareasofcoatingfballasttanksofshipsetc.Thisguidancenotesarepreparedtoapplythededicatedseawaterballasttanksofnewshipsdoublesideskinspacesofbulkcarriers.Alsousesfreferencetoothertanks.本指導(dǎo)性文件規(guī)定了船舶壓載艙涂層

6、破損的分類、定義及相關(guān)涂層破損區(qū)域面積的評估與計算方法等。本指導(dǎo)性文件適用于新建船舶的專用海水壓載艙和散貨船的雙舷側(cè)處所。也可供其它艙室參考。NmativereferenceThefollowingreferenceddocumentsareindispensableftheapplicationofthesedocuments.Fdatedreferencesonlytheeditioncitedapplies.Fundatedref

7、erencesthelatesteditionofthereferenceddocument(includinganyamendments)applies.ASTMD61001StardTestMethodfEvaluatingDegreeofRustingOnPaintedSteelSurfaces.下列文件中的條款通過本指導(dǎo)性文件的引用而成為本指導(dǎo)性文件的條款。凡是注日期的引用文件，其隨后所有的修改單（不包括勘誤的內(nèi)容）或修訂版均不

8、適用于本指導(dǎo)性文件，然而，鼓勵根據(jù)本指導(dǎo)性文件達成協(xié)議各方研究是否可使用這些文件的最新版本。凡是不注日期的引用文件，其最新版本適用于本指導(dǎo)性文件。ASTMD61001涂覆涂料前鋼材表面銹蝕等級評定方法（StardTestMethodFEvaluatingDegreeOfRustingOnPaintedSteelSurfaces）TermsdefinitionsFthepurposeofthisStardthefollowingdefin

9、itionsapply:下列術(shù)語和定義適用于本指導(dǎo)性文件。CoatingdamagesThephenomenonofcoatingdamagesgoestothesteelwhichiscausedbyweldfiremachinerycrashsoon.1級涂層破損最大直徑小于10cm的片狀涂層破損或長度上小于20cm的線狀涂層破損。Grade2coatingdamagesThepiececoatingdamageswhichmaxi

10、mumdiameterisnotlessthan10cmthelinecoatingdamageswhichlengthisnotlessthan20cm.2級涂層破損最大直徑不小于10cm的片狀涂層破損和長度上不小于20cm的線狀涂層破損。ContiguousdamagesWhichedgedistanceoftwocoatingdamagesareasislessthan10cm.緊鄰?fù)繉悠茡p兩破損涂層區(qū)域的邊緣距離小于10cm的相

11、鄰?fù)繉悠茡pTypesCoatingdamagesofballasttanksofshipscanbedividedintotwostsinaccdancewiththedifferenceofdamagedmethod:A)ButtscoatingdamagesB)Nonbuttscoatingdamages船舶壓載艙涂層破損按破壞方式的不同分為以下兩類：A)合攏對接縫涂層破損B)非合攏對接縫涂層破損Nonbuttscoatingdam

12、agescanbedividedintograde1coatingdamagesgrade2coatingdamagesinaccdancewiththedifferenceofdamagedgrade.非合攏對接縫涂層破損按破損程度的不同又分為1級涂層破損和2級涂層破損Canbedividedintopiececoatingdamageslinecoatingdamagesinaccdancewiththelengthwidthrat