Appendices

115

Appendix  6  Corrosion  protection  concept  to  demonstrate  durability  during
operating  time  for  the  2 nd  release
1.  Coating  protection  concept
•  Division  of  the  protection  areas  into  zones  (soil,  immersion,  water  changes,  spray,  atmosphere) ­
  for  internal  and  external  surfaces,
•  Outline  including  a  representation  of  the  protection  areas  and  the  respective  security  systems, ­

•  Information  concerning  the  composition  of  the  coating  layers  (e.  g.  substance,  number  of
layers,  thickness  of  each  layer,  total  coating  thickness),
•  Selection  of  systems  per  zone  (system  number  in  combination  with  the  appropriate  code  of
practice  (Im2:  ZTV-W,  NORSOK  M-501/ISO  20340,  DIN  EN  ISO  12944;  C5-M:  ZTV-ING,
NORSOK  M-501/ISO  20340,  DIN  EN  ISO  12944,  for  example);  special  approvals  needed  for
other  polymer  systems  not  commonly  used)  -  Note:  Only  includes  systems  for  initial  application ­
  -  not  repair  coatings,
•  Presentation  of  the  edge  protection  system:  Definition  of  the  respective  locations,
•  Colour  scheme,  oil-repellent  layer  in  the  water  change  zone,
•  Suitability  verification  -  corrosion  protection  test  for  security  systems  (code  of  practice  on
which  the  approval  test  is  based;  extended  verifications  covering,  for  example,  abrasive
wear,  COP  suitability),
•  Comparison  between  operating  time  and  the  protection  time  that  can  be  deduced  from  the
approval  tests,
•  Preparation  of  the  surfaces  (according  to  ISO  8501,  DIN  EN  1090,  etc.),
•  Description  of  the  application  process,  incl.  notes  on  the  repair  concept,
•  Application  (e.  g.  KOR-Schein  (corrosion  protection  qualification  certificate)  for  foremen)
and  monitoring  (for  example  a  form  according  to  DIN  EN  ISO  12944-8  and  ZTV-W  218,  inhouse
  monitoring  -  external  monitoring),
•  Appraisal  of  a  potential  entry  of  pollutants  (e.  g.  solvents)  into  the  seawater,
•  If  necessary,  presentation  of  electrochemical  procedures.
2.  Electrochemical  Protection
•  Division  of  the  protection  areas  into  zones  (internal/external),
•  Definition  of  protection  areas  and  surfaces  to  be  protected  (coated/uncoated),
•  Personal  qualifications:  Corrosion  protection  concept  on  the  basis  of  DIN  EN  15257  (minimum ­
  level  2),
•  Calculation  of  the  power  requirements  and  the  number  of  anodes  needed,
•  Galvanic  anodes:  Material  consumption  over  25  years,  assurance  of  the  uninterrupted  availability ­
  of  anode  material  on  or  within  the  structure,
•  Information  concerning  metal  accumulation  (in  g/m 2  3 )  in  the  water  of  the  wind  farm  area  due
to  galvanic  anodes  (worst  case  consideration),
•  Impressed  current  (e.  g.  anode  material,  amperage,  driving  voltage),
•  Number  and  type  of  anodes,  durability  (material  removal).