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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 13212 (1991): Blackoxide coatings for iron and steel parts [MTD 7: Light Metals and their Alloys] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 13212:1991 Indian Standard BLACK OXIDE COATING FOR IRON AND STEEL PARTS- SPECIFICATION UDC 621’793 : 669'1 6 BIS 1991 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 September 1991 Price Group I cillateM and cillateM-noN sehsiniF lanoitceS ,eettimmoC DTM 20 FOREWORD sihT naidnI dradnatS was detpoda yb eht uaeruB fo naidnI Standards, retfa eht tfard dezilanif yb eht cillateM and cillateM-noN sehsiniF lanoitceS eettimmoC had neeb devorppa yb eht lacigrullateM gnireenignE noisiviD .licnuoC ehT gnitaoc stneserp a kcalb ecnaraeppa that nac eb desu rof evitaroced .sesoprup ylhgiH yssolg kcalb ecnaraeppa and evitcelfer-non ecafrus ecudorp llud kcalb .ecnaraeppa sihT gnitaoc is ylralucitrap detius rof parts that tonnac etarelot yna lanoisnemid .pu-dliub sihT hsinif secudorp on elbaeciton lanoisnemid .egnahc nI eht noitaraperp fo this standard assistance has neeb devired morf 42931-C-LIM ,B SU yratiliM .noitacificeps fs 13212: 1991 Indian Standard BLACK OXIDE COATING FOR'IRON AND STEEL P-ARTS- SPECIFICATWN 1 EPOCS 4.1 modeerF morf stcefeD 1.1 sihT -standard seificeps eht stnemeriuqer fo ehT gnitaoc shall eb mrofinu ni ruoloc htiw yssolg kcalb edixo gnitaoc ( osla nwonk as lacimehc kcalb ecnaraeppa ot llud kcalb ecnaraeppa -dneped gninekcalb ) no nori and leets parts. gni no eht noitidnoc fo eht basis latem ’erofeb 1.1.1 sihT hsinif dluohs ton eb deificeps rof esu .gnitaoc deruoloC latem stnenopmoc shall eb eerf- erehw noitcetorp against dimuh ro evisorroc morf detaertnu sehctap and ykalf and nevenu tnemnorivne is ,deriuqer and no seilbmessa .tisoped yehT shall eb eerf morf ,sehctarcs pits gniniatnoc rehto than nori and leets parts, and ni and seudiser fo gnissecorp noitulos ro ti yam secalp erehw eht saera era elbapac fo gnippart eht etaitini noitaroireted fo eht cinagro gqitaoc ro gninekcalb .lacimehc erutamerp .noisorroc 1.1.2 sihT gnitaoc shall eb deilppa retfa all 4.2 Visual stseT ,gninihcam ,gnimrof ,gnidlew dloc ,gninethgiarts erehT shall eb on noitacidni fo yna hsidder nworb and tnemtaert-taeh .sessecorp ro neerg smut nehw detcepsni yllausiv rednu gnorts 2 ECNEREFER .thgil ehT elpmas shall osla eb depiw htiw a naelc ehT naidnI standard SI 11826 : 1986 -mmoceR‘ etihw htolc rof noitacidni fo smut. dedne ecitcarp rof lacimehc gniruoloc rof -reenigne 4.3 ytilauQ fo edixO goltaoC ( cilaxO dicA tseT ) gni stnenopmoc ni 1areneg and rof elcycib -opmoc stnen is yrassecen tcnujda ot this standard. eerhT spord fo 5 tnecrep cilaxo dica is detisoped no kcalb detaoc~edixo .ecafrus ehT noitcaer shall 3 LARENEG TNEMERIUQER eb devresbo up ot 8 .setunim retfA 8 setunim eht ehT nori and leets parts ,yam as raf as ,eibacitcarp ecafrus shall eb desnir and derapmoc ot .giF 1. eb ,detaoc ni ecnadrocca htiw SI 11826 : 1986. A thgil yerg ertnec htiw a thgil redrob ruoloc 4 GNITAOC STNEMERIUQER ( .giF 1A ) setacidni a roop ytilauq .gnitaoc A kcalB edixo gnitaoc shall teem eht stnemeriuqer yerg kcalb ertnec htiw a thgil redrob ( .giF )B-1 nevig ni 4.1, 4.2 and 4.3. ehT tset shall eb deirrac setacidni redrobda enil ytilauq .gnitaoc A kcalb ro tuo erofeb eht noitacilppa fo evitavreserp lio ro krad nworb ertnec htiw a thgil redrob ( giF 1C ) retfa .gnisaerged ajsetacidni doog ytilauq .gnitaoc . IA A Poor Quality Coating 18 A Borderline Quality Coating IC A Good Quality Coating FIG. 1 ASSESSMENOTF QUALITYO F BLACK OXIDE COATINGS 1 2123t;&l : 1991 5 NEGORDYH TNEMELTTIRBME 6.2 gnilpmaS rof ecnatpeccA fo a toL htgnerts’hgiH leets parts gnivah an etamitlu elisnet roF eht esoprup sihtfo sampling, a tol shall eb htgnerts fo I 647 2mm/N and evoba shall eb dekab dedivid otni stol-bus gnitsisnoc fo 100 selcitra ro at 191” f 14°C rof erom than, eerht sruoh retfa trap foereht any hcus ,selcitra as era deruoloc at noitacilppa fo eht edixo gnitaoc rof tnemelttirbme eno emit ni eht emas bath. owT samples shall eb .feiler detaoC springs ro rehto parts tcejbus ot detceles morf hcae sub tol and detcejbus eht-ot eruxalf shall ton eb dexelf roirp ot eht baking stset deificeps ni 4.1, 4.2 and 4.3. .noitarepo 6.3 airetirC fo ecnatpeccA fI eseht samples pass eht ,stset eht tol-bus -erper 6 GNILPMAS detnes yb meht shall eb .detpecca fI eno ro htob eht samples dluohs ,liaf owt rehtruf samples shall 6.1 gniIpmaS rof noitcudorP lortnoC eb detceles morf eht emas tol-bus and detcejbus ot lacitsitatS ytilauq lortnoc is dednwocec rof eht .stset fI htob eseht samples pass eht ,stset eht gnillortnoc eht ytilauq fo lacimehc gniruoloc fo tol-bus shall eb deredisnoc as gnimrofnoc ot eht .stnenopmoc roF this ,esoprup ti is dednemmocer standard. fI rehtie fo meht sliaf ni yna fo eht ,stset that eht selcitra that era deruoloe shall eb nekat eht tol-bus shall eb .detcejer morf a ecalp ni eht bath hcihw is ylekiI ot evig 7 GNIKRAM thgil edahs and detcejbus ot tha tset deificeps ni ehT detaoc selcitra yam eb dekram htiw eht eman 4.1, 4.2 and 4.3. ro edart .kram 2 Standard Mark ehT esu fo eht dradnatS Mark is denrevog eht-yb snoisivorp fo eht Bureau of Indian and eht seluR and snoitalugeR edam .rednuereht ehT dradnatS Mark Standards Act, 1986 no stcudorp derevoc yb an naidnI dradnatS syevnoc eht ecnarussa that yeht evah neeb decudorp ot ylpmoc htiw eht stnemeriuqer fo that standard rednu a llew denifed metsys fo ,noitcepsni gnitset and ytilauq lortnoc hcihw is desived and desivrepus yb SIB and detarepo yb eht .recudorp dradnatS dekram stcudorp era osla ylsuounitnoc dekcehc yb SIB rof ytimrofnoc ot that standard as a rehtruf .draugefas sliateD fo snoitidnoc rednu hcihw a ecnecil rof eht esu fo eht dradnatS Mark yam eb detnarg ot srerutcafunam ro srecudorp yam eb deniatbo morf eht uaeruB fo naidnI Standards. Bureau of Indian Standards SIB is a yrotutats noitutitsni dehsilbatse rednu eht ot Bureau of Indian Standards Act, 1986 etomorp suoinomrah tnempoleved fo eht seitivitca fo ,noitazidradnats gnikram and ytilauq noitacifitrec fo sdoog and gnidnetta ot detcennoc srettam ni eht .yrtnuoc Copyright SIB has eht thgirypoc fo allits .snoitacilbup oN trap fo eseht snoitacilbup yam eb decudorper ni yna mrof tuohtiw eht roirp noissimrep ni gnitirw fo .SIB sihT seod ton edulcerp eht eerf ,esu ni eht esruoc fo gnitnemelpmi eht standard, fo yrassecen ,sliated hcus as slobmys and ,sezis epyt ro edarg .snoitangised seiriuqnE gnitaler ot thgirypoc eb desserdda ot eht rotceriD ( snoitacilbuP ,) .SIB Revision of Indian Standards naidnI Standards era deweiver yllacidoirep and ,desiver nehw yrassecen and ,stnemdnema fi ,yna era issued morf emit ot .emit sresU fo naidnI Standards dluohs niatrecsa that yeht era ni noissessop fo eht tsetal stnemdnema ro .noitide stnemmoC no this naidnI dradnatS yam eb tnes ot SIB gnivig eht gniwollof :ecnerefer toD : .oN DTM 20 ( 3569 ) Amendments Issued Since Publication dnemA .oN etaD fo eussI txeT detceffA UAERUB FO NAIDNI SDRADNATS sretrauqdaeH : Manak ,navahB 9 rudahaB Shah rafaZ Marg, weN ihleD 110002 senohpeleT : 331 01 31, 331 13 75 smargeleT : Manaksanstha ( nommoC ot all seciffO ) lanoigeR seciffO : enohpeleT lartneC : Manak ,navahB 9 rudahaB Shah rafaZ Marg 311 01 31 WEN IHLED 110002 331 13 75 nretsaE : 41/l C. .I .T emehcS IIV M, V. .I .P ,daoR alotkinaM 37 86 62 ATTUCLAC 700054 nrehtroN : SC0 ,644-544 rotceS 35-C, HRAGIDNAHC 160036 53 38 43 nrehtuoS : C. .I .T Campus, VI ssorC ,daoR MADRAS 600113 235 02 16 nretseW : ,ayalakanaM 9E MIDC, ,loraM irehdnA ( East ) 6 32 92 95 YABMOB 400093 sehcnarB : ,DABADGMHA ,EROLAGNAB ,LAPOHB ,RAWHSENABUHB ,EROTABMIOC ,DABADIRAF ,DABAIZAHG ,ITAHAWUG ,DABAREDYH JAIPUR, ,RUPNAK ,ANTAP .MARUPAHTNANAVURIHT . detnirP at llewtnirP ,sretnirP ,hragilA aidnI ‘,.. . 1