Surface treatment seminar introduction
Jul 07, 2015
• Introduction
Process Design- OEM Perspective
Process Operation – Operator Perspective
Process Qualification Concerns
Product Quality Concerns
How to Improve Process Quality
Focus Point – Process Criticalities
2
• Seminar Overview
Surface Treatment – An Overview
Pre-Processes & Criticalities
Plating Processes & Criticalities
Post Processes & Criticalities
Review of Some Existing Plating Processes
3
Processes Design- OEM Perspective
A process is designed after extensive studies,
research work verified by experiments
Thus; each and every step as described by the
OEM has its own importance and implications;
may it be a simple / repetitive step e.g too
many hot-wash, cold-wash, blowing dry air or
ensuring continuity of some steps in the
process
4
Processes Operation – Operator Perspective
Process operators take the process as a set of certain
steps to be performed with a sole concern of
acceptance / rejection of out-coming products
Operators, over a period of time, based on their
observations / experience start taking shortcuts /
omitting process steps, which they think, do not have
any effect on the product &
Their assumptions remain true due to various reasons
like non-detection of underlying adverse effects,
incapacitation of process control parameters being
monitored to show the effects 5
Process Qualification Concerns
Specifications/requirements of process qualification
as specified by the OEM be met/ensured/monitored
Product Quality Concerns
Is the product coming out of a process a Quality
Product?
Who/How a product will be defined as Quality
Product. Answer is “ in our case Products meeting
OEM’s requirements & in general Products meeting User’s requirements” 6
How to Improve Process/Product Quality
Process Qualification Implementation
Intelligent Embedding of Quality Control Element
Knowing What, Why & How of the Process
Process Criticalities' Awareness
7
Focus Point – Process Criticalities
Process Criticalities can only be understood / ensured
through
Knowing What, Why & How of the Process
8
Surface Treatment An Overview
Finishing and Polishing
Coatings
Deposition
Organic Coatings
9
Pre-Processes Surface Preparation
Mechanical Preparation Blast Finishing
Shot Peening
Mass Finishing
Polishing
Buffing
Chemical Preparation
Pre-process Baking
Preheating
Effects of Discontinuity in process
Effects of Poor Cleaning process10
Plating Process & Criticalities
What & Why of Elctroplating
Factors Influencing Electro Deposition
Current density
Cathode Efficiency
Agitation
Bath composition & Solution concentration
Water Requirement
The presence of impurities & Filtration
Hydrogen Embrittlement and its Effects
11
Post Processes & Criticalities
Drying with Air (Hot/Cold)
Post Process Baking
Hot / Cold Water Rinse
Heat Treatment
Inspection
Quality Control
12
Review of Some Existing Plating Processes
Lead – Indium
Zinc Plating
13
