ABSTRACT
Numerous failures and eventual losses in the oil and gas industry have been traced to corrosion processes. Failures resulting from the inability of metals to support designed load requirement because of losses imposed by corrosion effects and this can be combated economically through the use of chemical inhibitors despite the fact that synthetic inhibitors are effective, nonetheless they are associated with problems of toxicity disposal litigation and enormous cost. In order to protect the environment and reduce cost the use of green or natural inhibitors as substitute and partial replacement of chemical inhibitors have become a method of choice, however inhibitors are environment specific therefore necessitating for the need for deep research into metal-inhibitor-media combination that would produce the best result In this study natural inhibitor will be employed on mild steel and aluminum respectively in a hydrochloric environment. lasienthera africanum (LA) was adopted to be the natural inhibitor. For mild steel and aluminum specimen, these samples were sourced from chemical industries and workshops and were immersed in O.5M HCL solution in the absence and presence of varying inhibitor concentrations. For a period of 18 days. Weight Loss (WL) technique was adopted and WL data’s were recorded for every 2 days for 18 days. WL experiment was perfonned and corrosion rate was calculated, out of which the highest inhibition efficiency LA of O.6g was (94.93%) for mild steel and (99.56%) for aluminum O.6g concentration of LA performed best for mild steel and aluminum immersed in HCL respectively. Thus the control of corrosion induced wastage of infrastructure through the use of natural inhibitor system could be use to mimic the exact corrosion process rather than costly experimentation are major contributions of this work.

ABSTRACT
Chemicals and prepared liquid food are very useful and essential in the field of science. Virtually nothing could exist or be made and there is hardly any process that could be completed without the use of essential chemicals at one stage or another. The immensely vast uses of chemicals demanded that it should be transferred from one point to another (pumping). To achieve this end, a great number of pump types and designs are available for various industrial and domestic applications. Flexible hose pump, (peristaltic pump). Being one of the modern and widely used for pumping chemicals, pharmaceutical liquids, and liquid foods. This research work seeks to design and fabricate a flexible hose pump. The design considerations and material selections for various components were based on the fluid being chemical. The manufacturing and fabrication processes were selected such that local technicians using locally available materials and being cheaper can construct it.

ABSTRACT
The relationship between revenue and cost is established to find the intrinsic nature. It is found when the best labour is 98 the cost is low and the number of cars are 1.4 with the intersection of 80 thousand RMB which is turnover point. When the best capital is 498RMB the turnover point is 0.5 of the number of cars with the 50 thousand RMB. The minimum total cost has been established to find the labor and piece. It is found the 1Yuan are the minimum total cost at labor of 0.001 with γ=0.02 and Pk=200. The biggest total cost will happen which attains 250 product at labor being 480.

ABSTRACT
The vehicle design is an significant work for modern advanced one so the design has dynamic equilibrium which can be defined as modeling virtual reality in this paper. It may provide more reality to modeling in order to promote the product properties and cost down. That is because the properties are predicted and promote the properties using the correct match, size and power. Therefore it may save cost and acquire best benefit for company. It decreases cost in terms of the regulation and promotion in advance that may decline the cost largely.

ABSTRACT
The stall phenomenon which happens in loaded motor is unqualification in application. Meanwhile it may measure the maximum property of DC (direct current) motor in manufacture. So the phenomenon is analyzed to find a simulation of electrical state to predict the maximum currency and torque which is a necessary method to be proceeded up to now before design. We find that the simulation fits well to the reference. The conditions of t=6s,R2=25Ω,U=20V result in the biggest stall force according to rotation to change time and voltage. Then it is t=8s,R2=20Ω,U=16V; t=10s,R2=15Ω,U=12V and t=12s,R2=10Ω,U=8V in turns. As for torque it is t=6s,R2=25Ω,U=20V; t=8s,R2=20Ω,U=16V;t=6s,R2=25Ω,U=20V and t=12s,,R2=10Ω,U=8V in turns. With increasing resistance R1 the power increases to 4W with 8V, and then to 6Wˎ 7Wˎ 10W with 12Vˎ16Vˎ20V respectively. With the increasing voltage and resistance R2 and decreasing time the power will be bigger.

ABSTRACT
In robot design and application the force and angle with angular speed is important so this study will model numerical simulation and discuss detail data to investigate their property. The force may increase as arm 1 angle increases whilst it may increase if angular speed increases in three freedoms. Meantime it will decrease if angular acceleration increases. It is found that with the angular speed increasing all three force may increase whilst the angular acceleration will cause its increase too in five freedoms. From these value it is observed that F1 is prior one to ensure the strength and fatigue life to estimate its strength then F2 is second one whilst F2 and F3 may be neglected in three freedoms. The force may increase as arm 1 angle increases whilst it may increase if angular speed increases in three freedoms. Meantime it will decrease if angular acceleration increases. The force size is F2>F1>F3 in five freedoms whilst the turn is ω>ω ̇ here ω is angular speed and ω ̇ is angular acceleration.

ABSTRACT
The properties like rotaryˎ power and torque has been searched in this paper. Therein the rotaryˎ power and torque may decline as the variable resistance increase. Detail is 5.2Kr/m at 0.2A and 0.25KW at 0.7A whilst it is 0.6Nm at 0.3A. The least one is 1Kr/m at 16Ω and 0.03KW at 8Ω whilst it is 0.12Nm at 14Ω. The better cost down is 8~16Ω whose properties are in the intermediate. It means that saving is necessary regardless of the maximum value. The rotary may decrease as the mass increases from 7.0g to 8.4g whilst the torque may increase.