# OAR Box 1313

Prepped by LaTeia Shed



## Document

Number: 

# 74 ) ll-B-4 8 Docket Number: 

# A-88-0 2

Printed 6/12/20089:03:30AM Sheet 74 of 99 p. 1P. 2 

# VIRI & A-88-0 2 MIDWES TRESEARC H INSTITUT E "H7b-<4 < 3 ^:e3*
- ••0 1 Harriso n Oak

s Bouievar

t Carv . N C ITS '



# 85/0 2 

# a feikxTtlS^ Date : Ma y

20 , 198 8 r • ' •'< • (Finalize dJun e 30 , 1988 ) \ ' . i % 

## Subject : Sit e Visit—Automati c Di e Castin g SpecialtieV~Ihc . \6 & 8 ^ Vv' U

Chromiu m Electroplatin g NESHA P ^7 ! ^•-..-•^>' 1 

## EPA Contrac t 68-02-3817 ; ES DProjec t MR I Projec t 7717- K From : Robi nBarke r To : Andre w

Smit h ESD/ISB/SS S (MD-13 ) U . S . Environmenta l Protectio nAgenc y Researc hTriangl e Park , N.C . 2771 1 I . Purpos e Th e purpos e o f thi s site visi t wa s t o determin e th e suitabilit y o f th e decorativ e chromiu

m platin g operatio na t the plan t fo r chromiu m emissio ntestin g t o asses s th e effectivenes s o f chemica l fume suppressants i ninhibitin g chromi c aci dmist . II . Plac e an

dDat e Automati c Di e Castin g Specialties , Inc . 3310 1 Harpe r Avenu e St . Clai r Shores , Michiga n4808 2 (313 ) 369-163 2 Januar y 13 , 198 8 III . Attendee s Automati c Di e Casting Specialties , Inc . (Automatic ) Davi dLawrence , Vic e Presiden t o f Operation s FredTaft , Plating Manage r Midwes t Researc hInstitut e (MRI ) Robi nBarke r

/ •P. 3

IV . Discussio n A meetin g wa s hel d wit hplan t personne l t o discus s th e decorativ e chromium

platin g operatio nan d possibl e emissio ntestin g a t Automatic . Th e discussio nwa s followe d b y a tou r o f th e platin g facility . A . Genera l Automati c Di e Castin g Specialties , Inc. , i s bot ha jo band captiv e sho p primaril y

engage d i ndecorativ e chromium platin g of

automotiv e whee l hub s and tri m

plates . Th e plan t employ s 10 0 people , wit h1 worke r pe r shif t directl y

involve d i nchromium plating . Th e platin g sho p operatin g schedul e i s 2 0 hour s pe r day , 4 day s pe r week , 5 2 week s pe r year . B . Proces s Descriptio n Ther e ar e tw

o decorativ e chromium platin g line s a t thi s plant . Figur e 1 present s a schemati c o f th e platin g sho p a t Automatic . On e lin e i s a larg e automate d lin e use dt o plat e al l decorativ e chromium plate d parts . Th e othe r line i s a smal l hand-operate dlin e use d t o replat e th e rewor k part s from

th e automate d line . Th e automate d lin e consist s o f a serie s o f tank s use d fo r cleanin g and platin g th e parts . Part s ar e plate dwit hlayer s o f coppe r and nicke l befor e the y

ar e chromiu

m plated . A

proces s flo w

diagra m

i s showni n Figur e 2 . Th e entir e platin g cycl e take s 2 hour s an d 2 0 minute s fo r on e rac k o f part s t o complete . Th e chromium platin g tank i nth e lin e i s 3. 4 meter s (m ) (1 1 fee t [ftj ) long , 0.8 4 m (2.7 5 ft ) wide , and1. 5 m (5. 0 ft ) dee p and hold s approximatel y 3,86 0 liter s (a ) (1,02 0 gallon s [gal] ) o f platin g solution . Si xrack s o f part s ar e inth e chromium platin g tan k a t a tim e wit ha retentio ntim e o f 3 minute s an d 3 5 second s fo r eac hrack . Th e tank i s equippe d wit hthre e rectifiers . Th e norma l operatin g voltag e i s 5. 2 volts , an d th e amperag e range s fro m 5,00 0 t o 6,00 0 ampere s o f direc t current . Th e automate d lin e operate s 2 0 hour s pe r day , 5 day s pe r week , 5 2 week s pe r year . Th e rewor k line consist s o f th e followin g tank s inseries : (1 ) causti c strip , (2 ) wate r rinse , (3 ) nicke l activator , (4 ) two wate r rinses , (5 ) aci d spray , (6 ) wate r rinse , (7 ) chromiu m plating , an

d (8 ) fou r bisulfit e rinses . A proces s flow

diagra m

i s show

ni nFigur e 3 . Th e chromium

platin g tank inth e lin e i s 1. 2 m (4. 0 ft ) long , 0. 9 m (3. 0 ft ) wide , an

d 1. 5 m (5. 0 ft ) dee pan

d hold s approximatel y 1,50 0 i (40 0 gal ) o f platin g solution . Th e tank i s equippe d wit hon e rectifier . Norma l operatio ni s 4. 5 volt s an d 3,00 0 amperes . Eac hrac k o f part s i s manuall y

transferre d throug hth e platin g line . Th e rewor k lin e operate s 8 hours/day , 5 day s pe r week , 5 2 week s pe r year . Bot hchromium

platin g tank s contai nchromi c aci d a t a concentratio n o f 28 0 gram s pe r lite r (3 7 ounce s pe r gallon ) o f platin g solution . Th e platin g solution s contai nbot ha fluorid e an d sulfuri c aci d catalyst . C . Emissio nContro l



# * , jP. 4



### Bot hchromiu

m platin g tank s ar e equippe dwit hsingle-side ddraf t hoods . Th e hood s ar e ducte dint o a commo nduc t alon g wit hth e latera l hoo do nth e alkalin e soa k tank inth e automate dline . Th e commo nduc t i s connecte dt o a singl e packed-be dscrubbe r manufacture dan dinstalle db

y Dual l Industries , Inc . i n1979 . Figur e 4 present s a diagram o f th e ventilatio nan

dcontro l system . Th e airflo w rat e t o th e scrubbe r i s 13 3 actua l cubi c meter s pe r minut e (4,70 0 actua l cubi c fee t pe r minute) . A permanent-typ e fum

e suppressant , Quin-Te c Cam s Nos . 3 an d4 , manufacture db

y 3 M an dsol db

y Quin-Te c inWarren , Michigan , i s use dt o reduc e chromi c aci dmis t fro m th e chromium

platin g tank inth e automate d line . Thi s typ e o f fume suppressan t control s mis t b y formin g a foa

m blanke t whic hentrap s th e mis t an dals o reduce s th e surfac e tensio no f th e platin g solutio nwhic hreduce s th e formatio no f th e mist . Th e fume suppressan t appear s t o be effectiv e a t controllin g chromi c aci dmis t becaus e n o visibl e mistin g wa s observe dwhe nth e tan k wa s operatin g durin g th e plan t visit . Th e fume suppressan t i s no t use dinth e chromiu m platin g tan k inth e rewor k lin e becaus e th e fum e suppressan t cause s electrica l arcin g whe nuse dinth e hand-operate dline . D . Conclusion s Automati c Di e Castin g Specialties , Inc. , i s bot ha joban dcaptiv e sho pperformin g decorativ e chromiu m platin g o f automotiv e parts . Emission s from

th e chromiu

m platin g tan k i nth e automate dlin e ar e controlle db

y a temporary-typ e fum e suppressan t an da packed-be d scrubber . Inaddition , plan t personne l hav e indicate dtha t th e ventilatio nhoo donth e automate dchromium platin g tank i s effectiv e a t capturin g chromi c aci dmis t whe nth e platin g bat hi s operate dwithou t th e fume suppressant . Th e ductwor k prio r t o th e scrubbe r i s 1 8 m (6 0 ft ) long wit hthre e entr y

point s downstream

o f th e chromium

tank , whic hshoul db e adequat e fo r locatin g a tes t port . Therefore , th e chromiu m platin g tank inthi s lin e i s a goo dcandidat e fo r performanc e testin g o f a fume suppressant . Th e plan t ha s agree dt o runth e platin g tank uncontrolle d an dals o ru nth e tank wit ha temporary - an dpermanent-typ e fume suppressan t t o enabl e EPA t o obtai nperformanc e dat a o nbot ha temporary an dpermanent-fum e suppressant .



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Figur e 1

. Schemati co f th e decorativ e chromiu m platin g sho p a t Automati cDi e Casting s Specialties , Inc. , St

. Clai rShores , Michigan

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. 15 . 16 . 17 . 18 . ALKALIN E SOA

K MIL D ALKALIN E POWE RSPRA Y SPRA YRINS E ALKALIN E SOAK-SECONDAR Y WATE RRINS E ELECTROCLEAN WATE RRINS E SULFURI C ACI D DI P WATE RRINS E WATE RRINS E COPPE RSTRIK E COPPE RCYANID E COPPE RSAVE R WATE RRINS E WATE RRINS E ELECTROCLEA

N WATE RRINS E WATE RRINS E 19a . 19b . 19c . I9d . 19e . I9f . 20 . 20a . 21 . 22 . 23 . 24 . 25 . 26 . 27 . 28 . 29 . 30 . 31 . ACI D COPPE R WATE RRINS E WATE RRINS E SULFURI C ACI D DI P WATE RRINS E WATE RRINS E SEMI-BRIGH T NICKE L HIGH-SULFU RNICKE L 3RIGH T NICKE L MICROPOROU S NICKE L WATE RRINS E WATE RRINS E WATE RRINS E CHROMIU M

DI P CHROMIU M

PLATIN GTAN

K CHROMIU M

SAVE R 3 1 SULFAT E RINS E 31SULFIT E RINS E 31SULFIT E RINS E



### Figur e 2 . Proces s flo wdiagra m o f th e mai n decorativ e chromiu m platin g line
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### Figur e 3 . Proces s flo wdiagra m o f th e rewor k decorativ e chromiu mplatin g line
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### Figur e 4 . Diagra m

o f ventilatio n an d contro l syste mfo r chromiu m platin g tank s a t Automati c Di e Castin g Specialties , Inc. ,

St . Clai r Shores , Michigan
.


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