ITMI940194A1 - Procedimento di cromatazione o fosfocromatazione e prodotti adatti all'identificazione del processo di trattamento - Google Patents

Procedimento di cromatazione o fosfocromatazione e prodotti adatti all'identificazione del processo di trattamento Download PDF

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ITMI940194A1
ITMI940194A1 IT94MI000194A ITMI940194A ITMI940194A1 IT MI940194 A1 ITMI940194 A1 IT MI940194A1 IT 94MI000194 A IT94MI000194 A IT 94MI000194A IT MI940194 A ITMI940194 A IT MI940194A IT MI940194 A1 ITMI940194 A1 IT MI940194A1
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ppm
identification
plating
treatment process
phosphocrome
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IT94MI000194A
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English (en)
Inventor
Antonio Vignati
Lodovico Palladini
Massimo Vanazzi
Rashid Madi
Edward L Jozwiak
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Paolo Granata & C S P A
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Priority to IT94MI000194A priority Critical patent/ITMI940194A1/it
Publication of ITMI940194A0 publication Critical patent/ITMI940194A0/it
Priority to PCT/EP1995/000252 priority patent/WO1995021278A1/de
Publication of ITMI940194A1 publication Critical patent/ITMI940194A1/it

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
    • C23C22/42—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also phosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C23C22/33—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also phosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
    • C23C22/43—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also hexavalent chromium compounds

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

Si introducono additivi diversi per differenziare chimicamente sia i bagni di trattamento che i rivestimenti di conversione chimica. la differenziazione si ottiene mediante aggiunta ai bagni di cromatazione o fosfocromatazione standard uno o più dei seguenti metalli, sotto forma di Ossidi, Acidi o sali derivati: Titanio, Vanadio, Manganese, Cobalto, Nichel, Argento, Afnio, Tungsteno. L'identificazione del processo di trattamento che ha prodotto un determinato particolare è effettuato preferibilmente con analisi non distruttive (Microanalisi superficiali) dei particolari trattati.

Description

DESCRIZIONE
Il problema prati co c he l ' invenzione, si pone _d.i riso è il seguente i produttori di serramenti in al luminio.si . appnovvigjmnano dei profi lati necessari , in_ba.se al l a con.ve-_ nienz.a .e.c.onom.ica., .p.ress.o-.una-pluralità di. fornitori che. ne e s e guo no_la_c.r ornata zio n e . o_fo.s_fqcromatazi one .(_ a 1 oro _volt.a . ac.qui.s.t.ando_Je_b.arre_._dajle_aziende produttrici}; con i_prodot e procedimenti noti .in.caso._di..difetti del rivestimento.,_ri su11a praticamente impossibile determinare_i1 fornitore che ha eseguito il trattamento , ai fini della reiativa__riyalsa,_ e la partita di profilati interessata (indjstjnguibije_da1le_ altre a magazzino) al fine di interrompere 11uti1izzo ed evitare ulteriori contestazioni e_danni. _ _ _ L'invenzione si pone il compito, grazie alla determinazjone di metalli presenti_in un rivestimento di cromatazione 0 fosfocromatazione su supporto di alluminio, della_ identificazione del processo di trattamento e più specificatamente 1'impianto che ha prodotto_il particolare.
_ Si deve innanzitutto rilevare che per cromatazione 0 fosfocromatazione si intende un rivestimento di conversione chimica rispettivamente a base di cromato di cromo 0 fosfato di cromo. Tale rivestimento si ottiene mediante trattamenti ir bagni.
Per-supporto-di' "alluminio, il termine, quale qui
impiegato, identifica-non-soltanto 1-alluminio puro, ma anche
le.leghe .in cuiJ-la-l-l-um-i-nio-è-presente almeno in percentuale
del 50%, ad esempio-le-leghe-di-alluminio contenenti quantità
minori di meta-l-lt.quali il Silicio ilMagnesio, i1Manganese
.11Ferro,_il.Rame.ecc.,
S.i.prevede che.le soluzioni per rivestimento-e le
cedure..secondo,la presente .invenzione saranno massimamente
usate,su_sup.erfj.ciJjaJ ega dLaJ-luminio che-hanno-un aspetto moderatamente_.briLlante e luci-do,—qual-i-i-profi-l-i estrusi-,
utilizzati per uso architettonico. Poiché i processi di cromatazio.ne_.e_f.os.focroniatazi.one sono-ben noti eηormati, si-re
SuperfJ-ua^na^dettag-liata descrizione.e.caratterizzaz-ione.
.. .Ai bagn.f di._cromataz-i.one-0—fos-focromataz-ione secondo
|1invenzione,s_i_.Introducono_ dunque_addi-tivi^diversi per-diffe
renziare.ehimi.carnente_s.ia__i_bagn.i._d.i-trattamento che i ri-vesti
,enti_di_conversi.o.ne_chimica
_ I bagn_i_._di_c.roma.taz_i.one_!l_standard" sono cos-i-i-denti
icabili: _
Cromo (Cr®+.). da100-a-l0000-PPm-- FIuoruri.(come.F J__sempji_c.i_o__c.omp.lessi) .da .10._a— ; -ppm-Nitrati..(come NO^l. da 0.. a 10000 PPm Altri,AcceJLerant_i_(.qua1j_.K_Fe_(_CN.L Lece _ .da 0- a— 2000 PpPpm-- -Sodio e Potassio ( comeL.Nal„o__K+) da_0_ a.1.1 ppm Altri composti . , da 0 a 11 ppm Anioni^ Cationiyorganici, ecc.)
mentre i -bagni di—fo sfocr omatazio ne— stardardi— sono-co s-i iden.tifj cab-i-l.i:-Cromo—(.Cr— 1 da— 100-a-l 0000 ppm F-osf-ati— (-come-PO^"-}- - da — 30-a— 10000 -PPm Fluoruri— (— com e-F — semplici— o-complessl) da — 1-0— a — 2-000 Sodio i ) P.otas sto— (c ome-N a- -o_K+) da — 0 — a— 10000 ppm -Altri— Com posti — da — 0 — a— 1-0 Anioni, Caticni, organi ci , ecc . )
-0.na_l.a_d-lf-f-e.nenz.iazlone-S-i-ott-ie oe-med-i-ante-agg-i-unta q ue sli-b ag ni _di... cromata zio n e_o-f o sfo c noma t a zio ne— standard cLi_u n o_o_plù-di_u n O-de.i— seguent-i-met all j-,-S ott o-f-orma-d-i 0ss.idl,_Ac-i-d-i_ o_sali— deri-v.at-i-· _ _
- Iltanlo _ lc.ome_T_t) _ da_ ' 1.0— a 5000-ppm ,^_V. a n.a dio _ le ome_Vj _ da_1.0_a 1 OOO-.p p m. --Ma ng.anese_ (come_Mn.)- da_L0_a _ t000_ppm n_Cob.alt.o_ (.c.ome_C.o_)_ da_ I0_a _ 5.0.0.0-ppm ^N-i.che.1_ (.come_N-i-)_ da_ l-0_a — 5000-ppm - Argento. .(_come_Ag.) d a_ 1.0_a _ 1000_p pm Afn.i.o _ (.c.ome_Hr). da_ 1-0— a _ 5.Q00_ppm _T.ungs_te.no_ (_c.ome_W)_ d.a_L0_a _ LOQO-ppm. [Ìe_i_b_agn_i_d_i__tra.tt.amen.t.o._di_conv_ersion.e_ch.imica_cos_i_o.t.teriLir_ ;_t,_J_p.art_tcolari_d_i_Al_l_urninio_e_s.ue_Le.ghe_c.h.e_do_v_es.s.ero_s.ub_i re l a C r omataz i_o.n e_o_l_a_Eo.sf_o_c.r ornata z i_o n e c o.n.t.en g on o ne.l rivestimento che si genera, anche quantità significati vamente. rilevabili del o dei _meta1Ji_p.resenti _ne_l_bago.o_si_a„soli o_ forma dj_sali o di ossidi, senza alterare 1e..proprietà chimi die o.fisiche del rivestimento_stesso
_ Qualora un particolare da identificare fosse vernicia_-_ to è necessario procedere ad una accurata rimozione del film di _ vernice con solventi in modo da non influenzare le caratteri i che chimiche del rivestimento con un attacco chimico acido o calino.
l identi fi cazione del processo d| trattamento che ha [prodotto un determinato parti col are può1 essere effettuata, [grazi e ad anal i si di struttive (asportazione chimica) p non jdi strutti ve (Microanal jsi _s_uperf ici al i ) dei particol ari tratta ci [con tale si stema.
PerJ^_esecuziqne deIle analisi distruttive_si_consig i a di utilizzare la metodologia specifica dalla Norma UNI 9921 appendice E avendo cura di utilizzare esclusivamente rivestirne riti invecchiata meno di_4 ore ed_essiccati al di_sotto di 40°C.
Cosi facendo si può' asportare anche parte del metallo base, per cui se nella lega l’elemento / è Presente i risultanti non sono pi_u_attendibili per cui si nrnandaal metodo non distruttivo.
Analogamente si deve provvedere per i rivestimento: invecchiati.
La soluzione cosi ottenuta dovrà essere analizzata con strumenti per la determinazione dei metalli ricercati [(Spettrometri per Assorbimento Atomico a fiamma, Spettrometri_ sequenziali.ad_esmi_ss_i_one._a.l_pl.asma.)_.pr_ocedendo-eventualmentead . una.. p r eliminare .co n c.e nt raz io n e. -(-medi an.te_l.enta-e b oll-iz io n e ) d ell-a_s o iu zio n e_d a_a n ali.z z a re...
L.esecuzi.one_del.le.analisi non-distrutti-v-e-puo— e-a= ._sene_e.f_fe.ttua.t.a_med.i.an.te_M-i.ciròana-l-i-S-i_supenf-ic-i-a-le-con-sonda EDS__(.Energy..Disper_s_i_v.e_.Spettroscopy)-ins.ta-llato-su-SEM-(Seanning_E_lec.tmn_M_i.cr_oscopy)_o_verosi.m.i-l.men.te_con-strumentianalogh.i_che diano..,.una._.r.ispos.ta_anali-tica_con_precislonesuperiore (ESCA. AU.GER,_ecc..)_e.f_f_e.ttuando_anali.s.i—supenf-ic-ia-l4 _ Grazie a..ques.te_tecno_l.og_ie,..effettuando .microanal-isi superfletali_con_st.rat.o_analizza.to_par.tico.larmente_r.idot.to_ infer_iore_ai_2_mi_crome_tìni_con_Sonda_EDS.,_(.c_i.oè_ener_g_i.e,infeniorj_a 15 KV)„si ri.scon.tra.una.p.resenza-dei.metalii_addi.z_i.ona Cos_i__fac_endo_s_i__r_i_le_va_anch.e_p.arte_.del meta.Ll.o_base., per cui se nella lega lo/gli e†mento/i identificante/i, il_ processo„è presente,.i.rj.sultati_deb.bono ess.ere_.valuta.ti.compa rando l'analisi dello spessore in esame con ana.li.si su_spezzon.i_di..Al1uninio_de_l.l_a_stes.S-a_l_e.ga_tr.a.t.ta.t.i_co.n_processo_esen.te da elemento/i identificante/i._
In tal modo la presenza accertata di un determinato_ emento mediante più microanalisi superficiali consecutive su aree significative (operando tra 100 e 500 ingrandimenti). .deIlo stesso spezzone, qual
da un determinato processo di trattamento.

Claims (1)

  1. RIVENDICAZIONI 1.- Procedimento di cromatazione o fosfocromatazione, caratterizzato dal fatto che nei bagni standard vengono introdotti differenti metalli, analiticamente rilevabili. 2.- Procedimento di cromatazione o fosfocromatazione secondo la rivendicazione 1, caratterizzato dal fatto che ai bagni standard viene aggiunto uno o più dei seguenti metalli, sotto forma di Ossidi,Acidi o sali derivati: - Titanio (come Ti) da 10 a 5000 ppm - Vanadio .;(comé',V) da 10 a 1000 ppn -Manganese (come Mn) da 10 a 1000 ppn - Cobalto (come Co) da 10 a 5000 ppm - Nichel (come Ni) da 10 a 5000 ppri - Argento (come Ag) da 10 a 1000 ppm - Afnio (come Hr) da 10 a 5000 ppri - Tungsteno(come W) da 10 a 1000 ppm 3.- Procedimento secondo le rivendicazioni 1 e 2, caratterizza ito dal fatto che l'identificazione del processo di trattamento è effettuato con analisi non distruttive (Microanalisi superficiali).
IT94MI000194A 1994-02-03 1994-02-03 Procedimento di cromatazione o fosfocromatazione e prodotti adatti all'identificazione del processo di trattamento ITMI940194A1 (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IT94MI000194A ITMI940194A1 (it) 1994-02-03 1994-02-03 Procedimento di cromatazione o fosfocromatazione e prodotti adatti all'identificazione del processo di trattamento
PCT/EP1995/000252 WO1995021278A1 (de) 1994-02-03 1995-01-25 Chromatverfahren bzw. phosphat-chromatverfahren und zur feststellung des behandlungsverfahrens geeignete werkstoffe

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IT94MI000194A ITMI940194A1 (it) 1994-02-03 1994-02-03 Procedimento di cromatazione o fosfocromatazione e prodotti adatti all'identificazione del processo di trattamento

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ITMI940194A1 true ITMI940194A1 (it) 1995-08-03

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10351666B3 (de) * 2003-11-05 2005-01-27 Erbslöh Aluminium Gmbh Aluminiumprodukt

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483510A (en) * 1945-04-14 1949-10-04 United Chromium Inc Composition for dip coating solution and dip process for coloring zinc
NL81501C (it) * 1952-04-03
US3397090A (en) * 1964-11-10 1968-08-13 Hooker Chemical Corp Metal-coating composition and process
NL128122C (it) * 1964-12-29
FR1470884A (fr) * 1965-03-09 1967-02-24 Parker Ste Continentale Procédé de formation de revêtements améliorés sur du métal
US3647568A (en) * 1969-10-28 1972-03-07 Macdermid Inc Colored phosphate coatings and method of application
GB8507181D0 (en) * 1985-03-20 1985-04-24 Omi International Benelux Bv Passivation
JPS6267180A (ja) * 1985-09-19 1987-03-26 Aisin Seiki Co Ltd アルミ合金材の燃料パルプのクロメート処理方法
GB8828559D0 (en) * 1988-12-07 1989-01-11 Novamax Tech Corp Composition & method for coating metal surfaces
JP2839111B2 (ja) * 1990-08-28 1998-12-16 日本パーカライジング株式会社 亜鉛系メッキ鋼板のクロメート処理方法
JP2982263B2 (ja) * 1990-09-17 1999-11-22 三菱マテリアル株式会社 アルミニウム缶およびその製造方法
JPH055185A (ja) * 1991-06-26 1993-01-14 Nippon Parkerizing Co Ltd アルミニウムの表面処理方法
JP2788362B2 (ja) * 1991-08-22 1998-08-20 川崎製鉄株式会社 識別性に優れた有機複合被覆鋼板
IT1254456B (it) * 1992-02-14 1995-09-25 Basf Italia Composizione marcante-denaturante particolarmente adatta per marcare edenaturare bitumi combustibili o prodotti affini.

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WO1995021278A1 (de) 1995-08-10

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