Failure

Analysis

  Has bubbles, wrinkles, uneven seams on the plastic

  part surface

1.  Plastic injection mold is not smooth

2.  Improper plastic injection conditions

3.  High water content in plastic

  The surface of part isn’t hydrophilic after roughening

1.  Roughen is not enough

2.  The plastic is improper

  After roughening, the surface of the plastic part will be crumbly or appear yellow, and it is easy to be scratched.

1.  Too much roughen, break the surface of plastic

2.  Bad quality plastic

  No nickel deposit or just partly deposit during the

  electroless nickel process

1.  Imbalance electroless nickel solution

2.  Colloidal Pd isn’t activated enough, colloidal dissolve not enough or too over

3.  Parts have inner stress

  No copper deposit or just partly deposit during the

  electroless copper process

1.  Imbalance electroless copper solution

2.  Not enough roughen

3.  Failure colloidal Pd activation solution

4.  Colloidal dissolve too over

5.  Parts have inner stress

  Have powder on the surface of electroless nickel

  solution or electroless copper solution

1.  Electroless nickel solution or electroless copper solution start to decompose, and solution get turbid

2.  Overload of solution

  After electrocoppering, the metal around the rack

  contact was dissolved.

1.  The initial current is too high

2.  The deposit layer is too thin

3.  Shelved it too long after deposit

  Bad layer adhesion

1.  Improper formula of roughening solution

2.  Improper roughening temperature and time

3.  Inexhaustive degreasing

4.  Bad molding conditions

5.  Improper adjustment of electroplating solution

  Pinholes and depression on coating

1.  Too over roughen, too over corrosion.

2.  Disorder activator and accelerator

3.  The electroplating solution has impurity or precipitates

4.  Improper adjustment of electroplating solution

  Colloform partly appear on the electroless layer

1.  Inexhaustive degreasing

2.  Inexhaustive roughening

3.  Improper activation condition

4.  Overload of solution, parts overlap and no agitation

  Has bubbles on the plated parts

1.  Plastic pretreatment doesn’t reach the process requirement, roughening time is too short or too long, bad sensibilization and activation

2.  Temperature varies greatly in the store process

3.  Incorrect copper, nickel, chromium control

  Plated parts deform

1.  Roughening temperature is too high

2.  Elasticity of plating rack is too high