Tin Soldering Course

Lesson 1 • Safety and Hazard Awareness

Identifies thermal, chemical, and fume hazards associated with tin soldering. Establishes mandatory safety practices that apply throughout the entire course.

Lesson 2 • Flux: Purpose and Types

Explains how flux removes oxides and promotes wetting, covering rosin, no-clean, and water-soluble types. Proper flux choice directly affects joint integrity.

Lesson 3 • What Soldering Is and Does

Defines soldering as a metallurgical joining process and distinguishes it from welding and brazing. Establishes the conceptual baseline for all subsequent technique chapters.

Lesson 4 • Tools and Equipment Overview

Introduces soldering irons, stations, tips, solder wick, and pumps. Students learn to match tool specifications to task requirements.

Lesson 1 • Workstation Ergonomics and Layout

Establishes an organised, ergonomic bench layout that reduces fatigue and errors. Proper layout supports safe, efficient soldering sessions.

Lesson 2 • Equipment Inspection and Storage

Defines pre-use inspection routines and proper storage procedures for irons and consumables. Routine maintenance extends equipment life and prevents mid-task failures.

Lesson 3 • Temperature Calibration and Control

Covers setting and verifying iron temperature using thermometers and test joints. Accurate temperature control is the single largest factor in consistent joint quality.

Lesson 4 • Selecting the Right Soldering Iron

Guides selection based on wattage, tip style, and application type. Correct iron choice prevents thermal damage and poor wetting.

Lesson 1 • Through-Hole Component Soldering

Applies heat and feed technique to PCB through-hole pads and component leads. Students practise forming consistent fillet joints on real boards.

Lesson 2 • Joint Cooling and Handling

Explains natural cooling, movement prevention, and post-solder handling to avoid cold joints. Correct cooling habits lock in joint quality.

Lesson 3 • Solder Feed and Flow Control

Teaches correct solder introduction angle, feed rate, and volume control. Proper feed technique prevents bridging, voids, and excess solder.

Lesson 4 • Heat Application Principles

Explains how to heat the joint, not the solder, and why thermal mass affects technique. This principle underpins every soldering task in the course.

Lesson 1 • Using Magnification Tools

Covers loupe, stereo microscope, and digital microscope use for detailed joint analysis. Magnification reveals defects invisible to the naked eye.

Lesson 2 • Common Defect Types

Catalogues cold joints, bridges, voids, tombstoning, and insufficient solder with root causes. Recognising defects is prerequisite to correcting them.

Lesson 3 • Visual Inspection Criteria

Defines surface appearance indicators—shine, contour, and wetting angle—for acceptable joints. Visual inspection is the primary quality gate in production and repair.

Lesson 4 • Industry Quality Standards Overview

Summarises widely adopted workmanship standards for electronics and plumbing solder joints. Aligning to standards ensures professional-grade output.

Lesson 1 • Through-Hole Component Removal

Teaches sequential heating and extraction of through-hole components with minimal pad stress. Proper technique preserves board integrity for re-use.

Lesson 2 • Surface-Mount Component Removal

Covers hot-air and iron drag techniques for removing SMD resistors, capacitors, and ICs. SMD removal requires precise temperature and airflow control.

Lesson 3 • Desoldering Tool Selection

Compares solder wick, vacuum pumps, and hot-air stations for different desoldering tasks. Choosing the right tool prevents pad and component damage.

Lesson 4 • Rework Quality Verification

Applies inspection and testing skills from Chapter 4 to verify reworked joints meet acceptance criteria. Rework is only complete when the joint passes all quality checks.

Lesson 1 • Fine-Pitch and BGA Considerations

Introduces challenges of fine-pitch QFP and BGA soldering, including bridging risks and X-ray inspection. These advanced packages require heightened precision and verification.

Lesson 2 • Reflow and Hand-Iron SMT Soldering

Covers hot-air reflow, toaster oven reflow, and iron drag soldering for SMD components. Multiple methods give students flexibility across different production environments.

Lesson 3 • Solder Paste Application

Covers stencil printing and manual syringe application of solder paste for SMT work. Correct paste volume and placement determine reflow joint quality.

Lesson 4 • SMT Component Identification

Identifies resistors, capacitors, diodes, SOICs, QFPs, and BGAs by package type and pitch. Component recognition is prerequisite to selecting the correct soldering approach.

Lesson 1 • Torch Selection and Flame Control

Introduces propane and MAPP torches, flame adjustment, and safe torch handling for pipe work. Torch technique differs significantly from iron-based soldering.

Lesson 2 • Making the Plumbing Solder Joint

Walks through the complete joint-making sequence: heat, feed, and cool for copper fittings. Correct sequence ensures full capillary fill and a watertight joint.

Lesson 3 • Flux Application for Plumbing

Teaches correct flux type selection and application volume for copper pipe joints. Over- or under-fluxing causes corrosion or dry joints in plumbing systems.

Lesson 4 • Copper Pipe Preparation

Covers cutting, deburring, and cleaning copper pipe and fittings to achieve oxide-free mating surfaces. Surface preparation is the most critical step in plumbing soldering.

Lesson 1 • Flux and Alloy Process Variables

Analyses how flux activity level and alloy composition affect wetting, spread, and residue. Matching flux and alloy to the process reduces defect rates.

Lesson 2 • Continuous Improvement Practices

Introduces defect rate tracking, yield metrics, and iterative improvement cycles for soldering operations. Continuous improvement sustains quality gains over time.

Lesson 3 • Process Documentation and Control

Establishes written work instructions, parameter logs, and change control for soldering processes. Documentation enables consistent quality across operators and shifts.

Lesson 4 • Root Cause Analysis for Defects

Applies structured problem-solving to trace defects back to process variables such as temperature, flux, and technique. Systematic analysis prevents defect recurrence.